hp per liter
(from Jaguar Press
Release) 2010 Jaguar XKR
- The new generation of
Jaguar XK sports coupe and convertible has all-new engines giving
more power and performance with greater efficiency; revised
exterior styling and interior enhancements
- Advanced aluminium body architecture is strong and light-weight
and the key to optimising performance, dynamic agility, competitive
CO2 emissions and fuel economy
- All-new AJ-V8 Gen III direct-injection engines are the most
advanced and efficient engines Jaguar has ever produced:
5.0-litre supercharged AJ-V8 Gen III R delivers 510PS (510bhp SAE),
625Nm of torque and propels XKR coupe to 60mph in just 4.6 seconds
5.0-litre naturally aspirated AJ-V8 Gen III engine delivers 385PS
(385bhp SAE), 515Nm of torque and propels XK coupe to 60mph in just
- Improved CO2 emissions performance (Euro Stage V compliant two
years ahead of legislative requirement) and fuel economy comparable
to the less powerful 4.2-litre engines they replace
- New generation of XK is true to the heritage of Jaguars legendary
performance, delivering a superb balance of dynamic ability and
- State-of-the-art six-speed automatic transmission has seamless
gearshifts plus, for the first time on the XKR model, an electronic
differential optimises traction and dynamic performance
- New design features, including exciting user-friendly technologies
such as the JaguarDrive Selector first seen on the XF, further
enhance performance, driving dynamics and the XKs luxury sporting
- Now three models in the range: XK, XK Portfolio and XKR. Design
revisions include a new front bumper, new mirrors with integrated
LED side repeater, rear valance, rear LED lights and colour-coded
side power vents
- First customer deliveries from March 2009, dependent on market and
The 2010 XK and XKR
Built in the tradition of great grand tourers, with
state-of-the-art engineering, aerospace-inspired construction and
outstanding driving dynamics, the new XK is the latest in a long
line of legendary performance Jaguars.
Mike ODriscoll, Managing Director, Jaguar Cars
The Jaguar sports car experience moves on to a new level in 2009
with the introduction of a new generation of the XK and XKR coupe
With all-new V8 engines delivering more power and performance with
greater efficiency, even more dramatic looks, interior enhancements,
advanced lightweight aluminium body structure and a wider range of
models, the new XK and XKR build on 60 years of legendary
performance to deliver the best of everything Jaguar. Designated
2010 model year but dependent on model and market available from
as early as March 2009, the new XK range not only stands out from
the crowd, it stands apart.
The combined efforts of Jaguars designers and engineers have
produced a sports car that utilises advanced technologies at a
higher level than ever before. The benefits of the XKs lightweight
but stiff and strong chassis are already acknowledged. Not only does
this architecture bring dynamic benefits thanks to its torsional
rigidity, it also offers excellent safety and crash repair features
and provides the ideal base to improve performance across the board
including optimised fuel economy and CO2 emissions.
The AJ-V8 Gen III engines are the most advanced and efficient Jaguar
has ever produced. They deliver significantly more power and torque
than the previous generation of engines: 510PS and 625Nm in the new
supercharged XKR and 385PS and 515Nm in the XK models.
With the introduction of these all-new 5.0-litre direct-injection V8
engines comes a new level of performance for the XK, with improved
acceleration from standstill and stunning in-gear acceleration
times. All models are electronically limited to a maximum speed of
155mph (250kph), but the 0-60mph sprint for naturally aspirated
coupe models is now 5.2 seconds (previously 5.9 seconds), while for
the supercharged XKR coupe, 0-60mph is 4.6 seconds (previously 4.9
In-gear times are equally impressive, with the naturally aspirated
XK accelerating from 50-70mph in just 2.5 seconds, while the
supercharged XKR completes the same sprint in just 1.9 seconds.
And yet thanks to a combination of excellent powertrain efficiency
and the XKs advanced lightweight body architecture, all XKs offer
strong fuel economy and impressive CO2 emissions ratings. Fuel
economy is comparable to the previous generation of XK despite the
significant increases in power and performance and CO2 emissions
from each engine are better than the out-going versions.
With an all-new, supercharged AJ-V8 engine and dramatic new looks,
the new XKR has all the performance, power and panache that you
expect in the ultimate sporting Jaguar.
Mike ODriscoll, Managing Director, Jaguar Cars
Allowing the engines to optimise their power is one of the most
sophisticated transmissions available. Jaguars acclaimed
electronically controlled, six-speed ZF 6HP28 transmission offers an
unparalleled combination of driver control matched to virtually
undetectable gearshifts. With control either from steering
wheel-mounted paddles or full automatic mode via the JaguarDrive
Selector, which is new for the 2010 Model Year XK, the transmission
is now paired with an advanced electronic differential on the XKR
model. This ensures the supercharged car accelerates even faster,
handles even more precisely and sets new standards of dynamic
There are three core models in the new XK range: the XK, the highly
equipped XK Portfolio and the supercharged XKR, each with its own
sporting character. In addition to the many changes under the skin,
the new XKs are visually different to the previous generation. Each
still looks just like a Jaguar should look seductive, powerful and
elegant but all models, coupe and convertible, introduce revised
exterior styling that underlines Jaguars contemporary thinking on
Inside, quality levels are raised even further with new interior
trim and finishes that demonstrate Jaguars craftsmanship, plus even
more comprehensive specification. The driver is the centre of
attention, with exciting new ideas, including the acclaimed
JaguarDrive Selector, Adaptive Dynamics (the latest in
computer-controlled suspension) with Active Differential Control and
comfort features such as heated and cooled seats taking the
driving experience of the new XK range to even higher levels of
luxury alongside the improved performance.
The new XK delivers more power, more performance and more
technology without compromise. It moves the Jaguar sports car
experience on to a whole new level.
Mick Mohan, Director, Jaguar Programmes
THE NEW 2010 XK AND XKR IN DETAIL
The new XK is a sophisticated grand tourer with the heart of a true
sports car, combining effortless high-performance and
state-of-the-art V8 powertrains with a new level of advanced
technologies, intuitive control and Jaguars superbly crafted,
new-fashioned luxury interiors. The range comprises naturally
aspirated XK and supercharged XKR models, available in 2+2 coupe or
convertible body styles.
All-new AJ-V8 Gen III 5.0-litre direct-injection engines bring
significant improvements in power and torque and they do so without
compromising fuel economy and emissions. In both respects, every
model in the new XK range, in spite of such large performance and
flexibility gains across the board, is comparable to their
The impressive fuel economy for such powerful cars is attributable
to the combination of the XK ranges lowest-in-class weight and the
all-new AJ-V8 Gen III engines. As well as the intrinsic advantages
of the engines light weight, these advanced all-aluminium four-cam
power units have a number of features that deliver power with very
high efficiency, including spray-guided direct injection (SGDI),
which improves performance and economy, and dual independent
variable cam timing (DIVCT), which benefits performance and economy,
while also reducing emissions.
The simplified and logical model range for the new XK comprises
three clear choices XK, XK Portfolio and supercharged XKR. Each
has its own specific choices of trim, colour and fine detail, but
every one has the same underlying sporting character and clear
emphasis on efficient performance, luxury and craftsmanship. Beyond
that, the XK vehicle personalisation programme also offers an
extensive range of accessories that allow the customer to add
further bespoke touches, both inside and out.
Performance on a new level
In naturally aspirated form, the new AJ-V8 Gen III 5.0-litre engine
delivers 385PS (SAE) and 380lb ft (515Nm) of torque respectively
26 and 23 percent more than its 4.2-litre predecessor. The XKRs
supercharged 5.0-litre version delivers a mighty 510PS (510bhp SAE)
and 461lb ft (625Nm) of torque improvements of 23 and 12 percent
respectively over the supercharged 4.2-litre engine.
On the road, while maximum speed remains under electronic control at
155mph (250kph), these power and torque gains allied to the
lightweight aluminium body architecture of the XK dramatically
improve acceleration times. For the naturally aspirated XK, 0-60mph
is reduced to 5.2 seconds from 5.9 seconds (and 0-100kph from 6.2 to
5.5 seconds); for the supercharged XKR, 0-60mph is reduced to 4.6
seconds from 4.9 (and 0-100kph to 4.8 seconds from 5.2).
The supercharged XKR is also impressively efficient, with combined
fuel economy of 23.0mpg and a CO2 rating of 292g/km an improvement
over the previous XKR and 16 and 17 percent better, respectively,
than the equivalent figures for the BMW M6.
Crucially, however, the naturally aspirated XK also continues to
better its closest rivals on economy and CO2 ratings, with an
average consumption of 25.2mpg and a CO2 figure of 264g/km seven
percent better than the equivalent figures for the Mercedes-Benz
SL500 thanks to its fuel efficient engine and significantly lower
kerb weight: 1660kg compared to the SL500s 1845kg.
Visible changes on the new XK and XKR reflect the significant
changes under the skin. Carefully revised exteriors take the
seductive, elegant lines that define Jaguars new design language
and interpret them for a beautiful 2+2 sports car whose shape is
even more taut, powerful and athletic. Evoking the essence of
performance long before it moves, the new XK family shape is
unmistakably new-school sporting Jaguar: wholly contemporary,
finely sculpted, efficiently packaged and precisely detailed.
Design Director Ian Callum outlines new design features on the XK
The current XK was the first car to signify a new generation of
Jaguars cars that have honed our image every bit as successfully
as the original XK120 or E-type. Now the new XK range reinforces
that message. The cars visual agility and beautiful lines have been
enhanced with a distinctive new front end, rear lights and revised
body styling that gives every model even more presence.
The exterior changes for the naturally aspirated XK models and the
supercharged XKR are highlighted by a distinctive and purposeful new
front end design, new LED rear lights and a new lower rear body
valance. New LED rear light clusters incorporating fog lamps plus
twin reversing lamps (rather than the previous single lamp units)
give every new XK a unique night time signature, while LED
technology is also included in the integrated side repeater and
approach lamps in the new exterior mirrors. Every new XK also
features revised body-coloured side power vents.
Beyond the shared changes, subtle differences in detail distinguish
each of the three models in the new XK range. All display purposeful
front bumper features with stylish, chrome-detailed inserts and
further chrome detailing to the upper mesh grille. The XKR is set
apart by also featuring chrome on its lower mesh grille - which is
finished in black on the XK and XK Portfolio models. All models now
feature chrome detailing on window surrounds and rear signature
blade, and in addition the XKR comes with a new lower rear valance
that is finished in body colour and a revised tailpipe design,
further emphasising its sporting performance.
Contemporary, sporting luxury, exceptional quality of craftsmanship,
and Jaguars renowned attention to detail are the keynotes of the
new XK ranges enhanced interiors. The cabin is clean, elegant and
spacious, and remains entirely in harmony with the sporting
character of the revised exterior.
The luxury character of the new XK and XKR, however, is guaranteed,
regardless of the customers choice of body style hard-topped
coupe or fabric-roofed convertible. Both benefit from the inherent
strength of Jaguars lightweight aluminium architecture, which means
that as well as being the lightest body structure in its class, the
body shells also have the highest torsional strength. And that
exceptional rigidity, with or without a fixed roof, means creak and
rattle-free refinement, even on unforgiving surfaces.
Beyond that, the convertibles triple-lined fabric roof gives a
level of fit and stability, even at very high speeds, that minimises
wind noise and other road noise and includes a luxurious interior
finish almost indistinguishable from a fixed roof. In addition, XK
Portfolio and XKR models feature luxurious Jaguar Suedecloth
headlinings as standard.
The folding roof can be powered up or down at the touch of a button
in less than 18 seconds. And when it is lowered, the convertibles
flush-folding roof retracts completely into the bodywork behind the
rear seats, under a smooth cover that retains the elegant, sporting
lines of the car. A roll-over protection system, which remains
hidden unless it is needed, deploys instantaneously as necessary to
provide occupants with the highest levels of protection in the event
of an incident.
For both coup and convertible, the latest feature enhancements are
showcased by the JaguarDrive Selector, which is neatly and
elegantly packaged in the centre console. The welcome to the car is
also enhanced by new, bright treadplate inserts. Many of the other
changes emphasise high levels of Jaguar craftsmanship with new
jewel-like touches. The three-spoke steering wheel now has a
leather-wrapped lower spoke, and Jaguars striking growler badge.
The new XKRs instruments further emphasise its performance
character with red pointers, while all models adopt a new white
illumination for their instruments.
New heated and cooled front seats are standard equipment on the new
XK Portfolio and on XKR with the optional R Performance interior
(dependent on market), and available as an option on the XK. The XK
features 10-way seat adjustability for both driver and passenger
seats, with heating and memory functions as standard while the XKR
seats have similar functions but with the unique R seat style. The
XK Portfolio and XKR with the optional R Performance interior have
16-way adjustable seats with heating and memory functions,
adjustable side bolsters and new cooled seats as standard.
The door casings are even more luxuriously crafted than before, with
saddle-stitched lines and a new interlayer to give a softer touch to
the top shoulder of the casing. The leather door pulls also
twin-needle stitching and a soft-feel interlayer. In each door, the
modified seat switch pack now includes single-piece chrome
There is a wide choice of interior colour options, including a new
combination for the XK Portfolio and XKR of Ivory seating with
Oyster upper cabin trim and Oyster carpets. Bond grain leather is
standard on the new XK interior, and an even higher quality
soft-grain leather with contrast stitching is standard in the XK
Portfolio and the new R Performance XKR.
Real wood veneers remain an important part of Jaguar craftsmanship
and now include a new Rich Oak veneer option alongside the classic
Burr Walnut for all three models. The new XK Portfolio also offers
the choice of an Ebony veneer, while the XKR offers its own unique
alternative in Dark Oak. A Knurled Aluminium veneer is also
available on XK and XK Portfolio, while Dark Mesh Aluminium is
available on XKR.
Industry-leading lightweight body architecture
Globally recognised as one of the key elements in Jaguars
intelligent use of advanced technologies, the XKs industry-leading
lightweight architecture constructs the entire body shell (the
internal chassis structure and external body panels) from a
combination of pressed, cast and extruded aluminium alloy
components. These are riveted and bonded together using techniques
originally developed in the aerospace industry and adapted for
automotive use by Jaguar.
The result is a body shell with a depth of quality that is rooted in
the highest structural integrity. It is also the lightest shell in
its class by a significant margin and the most torsionally stiff.
That all-round strength, rigidity and lightness underpin many
aspects of the XKs excellence, from fuel-efficient performance to
its inherent safety, durability and refinement and, of course, its
precise chassis dynamics.
Mike Cross, Chief Engineer, Vehicle Integrity explains the benefits
of this advanced body architecture:
Lightness benefits agility, and agility with high performance
defines the exhilarating yet refined nature of the Jaguar XK. It
accelerates harder, stops more quickly and handles with true
precision setting new standards of dynamic excellence.
The most advanced Jaguar V8 engines ever
New AJ-V8 Gen III engines in brief
- All-new direct-injection engines are much more powerful, compact
- 510PS, 625Nm, 292g/km CO2, 23.0mpg (12.3 l/100km) combined fuel
economy (the supercharged
Gen III R)
- 385PS, 515Nm, 264g/km CO2, 25.2mpg (11.2 l/100km) combined fuel
economy (the naturally aspirated Gen III)
- Conforms to EU 5 and US ULEV2 emissions regulations
- High efficiency, sixth-generation twin vortex supercharger (TVS)
- Central spray-guided direct-injection increases efficiency and
- Torque-actuated variable camshaft timing on all four camshafts for
improved response and efficiency
- Cam profile switching in naturally aspirated engine
- Variable-geometry inlet manifold on naturally aspirated engine
further increases low and high-end torque
- Low-friction design optimises fuel consumption
- 15,000-mile service intervals
Since the first XK was launched in 1948, generations of powerful yet
refined engines have played a crucial role in establishing the
unique character and pedigree of Jaguar cars. Now, the new 5.0-litre
V8 direct-injection engines continue that tradition, delivering
increased power and torque with reduced emissions and impressive
fuel economy. Available in two versions the supercharged 510PS and
naturally aspirated 385PS the new AJ-V8 Gen III engines exemplify
Jaguars reputation for innovation and engineering excellence.
Commenting on the new engine range, Ron Lee, Powertrain Group Chief
We set ourselves the challenge of developing an all-new V8 engine
series that improved on the performance and the refinement of the
excellent 4.2-litre, with comparable fuel economy and improved
emissions. We have achieved that with the AJ-V8 Gen III a superbly
responsive power unit of unsurpassed efficiency.
Jaguars all-new petrol V8s have been designed using the expertise
of powertrain engineers at Jaguars product development centre at
Whitley, Coventry, UK. Malcolm Sandford, Engine Group Chief
Engineer, explains the concept behind the project:
The emphasis was on delivering efficiency, superior dynamic
response and highly accessible low-end torque suited to real-world
driving, without compromising power at higher engine speeds.
The results are clear to see. Performance has been increased by 29
percent and 23 percent (87 and 94PS) on the naturally aspirated and
supercharged engines respectively, yet both meet EU5 and US ULEV2
emissions regulations. Despite the significant increases in power,
both have better emissions and comparable fuel economy to the
previous 4.2-litre units.
Both new AJ-V8 Gen III petrol engines are state-of-the-art in every
sense. The technical features have been engineered to deliver
unparalleled efficiency, refinement, power and torque for which
Jaguar is famous, combined with the lowest possible emissions.
Low-speed torque characteristics and throttle response are
world-class, while the supercharged version is one of the most
economical 5.0-litre V8 engine available.
Summarising this achievement, Director, Jaguar Programmes, Mick
These engines have been engineered by our 800-strong powertrain
team for the next generation of Jaguar cars. They deliver fantastic
straight-line performance and response that is second to none. The
combination of power, refinement and driveability is what our
customers expect of a Jaguar: they are smooth around town, but when
you want to drive quickly, the engines are hugely responsive and
deliver that classic, Jaguar sound quality.
Light, robust and very strong
The new AJ-V8 engines are built around a stiff, all-new, aluminium
block with cast-in iron liners and cross-bolted main bearing caps to
reduce noise, vibration and harshness. The blocks are high pressure
die-cast, providing a superior finish and greater dimensional
accuracy. The engines use aluminium heads, with four valves per
cylinder and spheroidal-graphite cast-iron crankshafts and forged
steel connecting rods. The cylinder heads for the first time are
specified with a secondary (recycled) aluminium alloy thus reducing
the environmental impact of manufacturing the new engine.
The new 5.0-litre direct injection petrol engines are more compact
than their predecessors. Overall engine length has been reduced by
24mm by relocation of the oil pump within the engine architecture.
This length reduction apparently a small amount improves engine
bay packaging in support of enhanced safety cell performance while
ensuring overall engine weight is virtually unchanged.
New supercharger optimises power
A sixth-generation, twin vortex system supercharger is fitted to the
XKRs 510PS engine. It is a compact Roots-type unit, feeding air
through twin intercoolers, which in turn are water-cooled by their
own discreet cooling circuit. The high helix rotor design improves
the supercharger thermodynamic efficiency by 16 percent over its
predecessor. It also improves noise quality to the point where the
unit is now virtually inaudible (making supercharger whine a thing
of the past). The intercoolers reduce the temperature of the
pressurised intake-air and so optimise power and efficiency.
The new air intake has been radically redesigned compared to the
previous V8. The intake air path is a direct feed to the
supercharger inlet from the centrally mounted front throttle body.
Air is delivered through twin air boxes, which reduce flow loss and
further increase efficiency.
Mechanically, the new supercharger and its intercoolers are
efficiently packaged in the V of the engine to deliver a lower
overall engine height in support of pedestrian safety requirements.
Direct injection - power with economy
One of the key features of the new petrol engines is an
industry-first, centrally-mounted, multi-hole, spray-guided fuel
injection system, delivering fuel at a pressure of up to 150bar
directly to the cylinder. This substantially contributes to improved
low-speed, dynamic response. The positioning of the injectors
ensures fuel is precisely delivered to the centre of the combustion
chamber, maximising air-fuel mixing and improving combustion
control. Fuel is delivered via twin, high-pressure fuel pumps that
are driven via auxiliary shaft in the all-new engine block.
The charge cooling effects of the direct-injection fuel system have
allowed the compression ratio of the naturally aspirated engine to
be raised to 11.5:1, further optimising the engine economy. The
supercharged engine also benefits from a compression ratio increase
to 9.5:1 from 9.0:1 in the previous 4.2-litre.
During the engine warm-up phase, the combustion system employs
multiple injection mode strategies to deliver 50 percent more heat
for fast catalyst warm-up and emissions reduction.
Torque-actuated variable-camshaft timing improves efficiency
A new type of variable camshaft timing (VCT) system introduces
another new technology. The four VCT units are activated by the
positive and negative torques generated by opening and closing the
intake and exhaust valves, instead of by oil pressure. This has
allowed the engine oil pump to be reduced in size, saving energy and
improving fuel consumption.
VCT units work independently on all four camshafts with 62 degrees
of authority on the inlet cams and 50 degrees of authority on the
exhaust cams. Timing is optimised by the engine control unit for
torque, power and economy at every point in the engines speed
The new VCT units are capable of a response rate up to three times
faster than in previous Jaguar engines, with actuation rates in
excess of 150 degrees per second. This delivers a more immediate
engine response to the drivers demand for power.
The naturally aspirated engine is also equipped with camshaft
profile switching (CPS) on the inlet camshaft. Depending on the
engines running conditions and the demands of the driver, the CPS
will switch between a profile that is ideal for low-speed driving
and another which gives increased valve lift for high performance.
Hydraulically-actuated two-piece tappets switch between profiles on
the tri-lobe camshaft altering both the lift and duration. The cam
lobe profile selected for lower engine speeds has a duration of 214
and lifts the valves 5.5mm. This optimises gas velocity for improved
low-speed torque and reduces valvetrain friction for improved fuel
economy. For high-speed driving, CPS switches to a cam lobe with a
duration of 250 and valve-lift of 10.5mm, allowing greater air flow
for high power. Switching is activated at 2800rpm at high load,
ranging to 4500rpm at light load conditions.
Variable Inlet Manifold optimises torque through the rev range
A new variable inlet manifold (VIM) on the naturally aspirated
engine can vary the length of its eight inlet tracts to optimise
power and torque throughout the rev range. Vacuum-operated actuators
open valves to select a longer, 680mm, inlet tract at low revs,
increasing the rate of both the airflow and the engine torque. As
the revs climb beyond 4700rpm, the actuators select a shorter, 350mm
path allowing a greater volume of air into the engine to optimise
power. The actuator position is monitored by the engine control unit
to improve torque throughout the engine speed range.
Reverse cooling turns up the heat
Every component in both V8 engines has been optimised for
efficiency, performance, low-end torque and reliability. An
innovative reverse-flow cooling system design has been employed to
deliver thermodynamic and friction improvements. The reverse-flow
cooling system pumps coolant through the cylinder heads before it
flows through the block and returns to the radiator. The resulting
cooler cylinder heads allow more optimum, knock-free, ignition
In addition, the 22kW oil-to-water heat exchanger, packaged at the
core of the engine, transfers heat from the coolant to the
lubricating oil during warm up, bringing the oil up to operating
temperature 14 percent faster than the cooling system used in the
4.2-litre V8. This improves fuel consumption in the crucial engine
warm-up period by approximately one percent - again a small amount,
but part of a package of efficiencies.
Reducing friction something for nothing
Minimising internal friction is key to improving fuel consumption
and CO2 emissions, and as such was a key aim when it came to the
design of the engines. As a result, the new Jaguar AJ-V8 Gen III
engines achieve another best in class, setting a new industry
benchmark for cranktrain efficiency.
All engine bearings were engineered for reduced friction without
compromising reliability. Diamond-Like Carbon Coating (DLC) has been
used to reduce friction on the fuel pump tappets and a solid film
lubricant has been used to coat the piston skirts. New engine oil
has a lower viscosity, contributing to an extension in service
intervals from 10,000 miles to 15,000 miles (or 12 months). Both V8
engines are now fitted with an electronic oil-level indicator for
added peace of mind.
Unique, Jaguar sound quality
Sound quality is a key characteristic of all Jaguars and is one
particular aspect that customers relish. With that in mind, Jaguar
engineers have accentuated the acoustic feedback into the cabin in
order to further enhance the driving pleasure.
The XKs exhaust sound track has been enhanced to provide a deeper
and more powerful character that matches the increase in torque at
low revs from the new engine. At higher engine speeds the intake
acoustic feedback system combines with the exhaust system to provide
more of that unique Jaguar sound quality character.
In addition to the fully active exhaust system in which valves open
to provide a more rewarding note, the new XKR has been engineered to
provide an intake feedback system to enhance the V8 sound character
commonly absent on supercharged engines. Intake manifold pressure
pulsations are fed into an acoustic filter at the rear of the engine
that is tuned to provide an edgy sports car crescendo at high
revs. The filter is controlled by the engine management system,
which only allows the sound to enter the cabin under the appropriate
The new intake feedback system combined with the fully active
exhaust system provides the most exhilarating aural experience yet
delivered on a Jaguar.
Uprated six-speed transmission handles extra power
Any transmission is a major factor in delivering the performance
that drivers desire, while integrating with the engine to optimise
emissions and fuel consumption. Jaguars acclaimed electronically
controlled, six-speed ZF 6HP28 transmission offers an unparalleled
combination of driver control matched to virtually undetectable
gearshifts. With control either from steering wheel-mounted paddles
or full automatic mode via the JaguarDrive Selector, the new XK
range delivers exhilarating performance.The supercharged V8 engine
with 510PS and 625Nm of torque transmits power through an uprated
version of the ZF 6HP28, additional clutch plates and an uprated
torque converter having been added to the transmission to
accommodate the extra power.
The transmission has a fully-adaptive shift system which delivers
seamless gearshifts and balances performance and economy at all
times. It also continually adapts to suit driving style, which can
vary from sporting to more economical. Jaguar Sequential Shift
suffers no torque interrupt, resulting in a smoother more powerful
shift feel, and an almost instantaneous shift from the time the
driver touches the shift paddle to the completion of the shift
The high levels of torque produced by the new engines make it
possible for the torque converter lock-up feature of the
transmission to function at low speeds, without slip. This approach
provides an additional fuel consumption benefit, contributing to the
official combined fuel economy of 23.0mpg (12.3 l/100km) in the XKR.
The advanced design of the transmission also includes a torsional
damper to absorb firing impulses from the engine, further smoothing
the driveline. The transmission is designed to be maintenance-free
with filled-for-life fluid.
Active Differential Control for optimum grip in XKR
Another first for Jaguar is the new Active Differential Control
(ADC), the final stage of the supercharged V8 driveline. Designed to
give improved traction and dynamic stability, the electronically
controlled differential continuously adapts to both the drivers
demands and the amount of grip available at each individual wheel.
Operated by an internal electric motor and ball-and-ramp
mechanism, the differential contains a multiplate clutch which
transmits or vectors torque to the wheel with most grip and
therefore maximises the cars traction. The multi-plate clutch
assembly is designed to prevent excessive differential slip, but
differs fundamentally from a conventional traction control system,
which uses the brakes to counteract differential slip, after it has
New JaguarDrive Selector completes the package
For the first time, the new XK range introduces the innovative
JaguarDrive Selector as its transmission control interface. First
seen on the Jaguar XF saloon, the JaguarDrive Selector features a
rotary shift control which rises into the drivers hand as the car
is started, to give intuitive, ergonomically efficient transmission
control from a neat, space-efficient interface.
The selector is, in fact, much more than just an unobtrusive yet
completely practical solution to selecting an automatic gear mode.
It also imbues the car with a strong driver handshake get into
an XK and the start button in front of the JaguarDrive Selector
pulses red, like a heartbeat; press this button to start the engine
and the cast alloy JaguarDrive Selector rises into the palm of your
From there, automatic transmission functions are selected simply by
turning the control with the fingertips. As an example, Drive to
Drive Sport selection is accomplished with a simple push and turn
action. Returning from S to D, the rotary control operates with
spring-assistance, which eliminates the need to pull the Selector.
It couldnt be simpler. And when the engine is stopped, the
JaguarDrive Selector returns automatically to its Park position.
The XK has always been an exceptional sports GT; now with huge
reserves of power and torque, the XKR sets new standards of dynamic
balance, succeeding in being both potent and rewarding yet balanced
and accessible at the same time.
Mike Cross, Chief Engineer, Vehicle Integrity
The new handshake of the JaguarDrive Selector is a subtle
reminder of the new XKs further enhanced sporting character and
superb dynamics, which combine to deliver a driving experience that
is exceptionally exciting and rewarding. The latest generation of
Adaptive Dynamics replaces Jaguars proven Computer Active
Technology Suspension (CATS) with an even more sophisticated
solution. Active damper tuning systems remove many of the
compromises of a passive damping system which must make a single
choice between softer damping for a comfortable ride and firmer
damping for more tautly controlled handling. CATS overcame that
compromise with automatically switchable damping modes, adapting to
the road and how the car was driven. But where CATS only offered two
settings: soft and firm, the new Adaptive Damping System in
effect provides a continuously variable damping strategy between
wide extremes, benefitting ride comfort, ultimate control handling
Its three primary functions are to control body vertical movement,
roll rate and pitch rate. One hundred times a second, Adaptive
Damping performs three critical functions: firstly, it analyses
induced body motions and sets each damper to an appropriate level in
order to maintain a constant and level body attitude maximising
control without compromising ride. Second, it also predicts the roll
rate due to steering inputs and selectively increases damping forces
to reduce roll improving handling feel and driver confidence. And
third, Adaptive Damping analyses fore and aft pitch rate due to
throttle and braking inputs and again varies damping forces to
reduce pitch further improving comfort and control.
Additionally, Adaptive Dynamics improves ride quality by monitoring
wheel position 500 times a second and automatically increasing
damping rate as the suspension approaches the limits of its travel.
Similarly it controls wheel hop on uneven roads by varying damping
to move any wheel out of its natural bouncing frequency.
From the cabin, the JaguarDrive Control interface allows the driver
to interact with Adaptive Dynamics by selecting modes for different
driving conditions and moods. In Dynamic Mode, Adaptive Dynamics
increases body control for a sportier feel. Dynamic Mode also
interacts with the engine ECU to give a more responsive accelerator
pedal reaction and quicker gearshift responses.
Winter Mode was introduced on the XF and now makes its first
appearance in the XK range, adding another element of dynamic
subtlety. Where Dynamic Mode offers a more sporty feel, Winter Mode
offers a more damped accelerator pedal response for progressive
control in slippery conditions, with bespoke shift settings that
delay and soften gearshifts, again for better control with low grip.
In keeping with its additional power and performance, the new XKR
offers the most sophisticated dynamic control of all, with Active
Differential Control and Adaptive Dynamics. The subtle control
strategies of these functions can be managed through the JaguarDrive
Control, which allows the driver to change the settings of the
Adaptive Dynamics system, which then works in tandem with the Active
Differential Control (ADC) an electronically controlled
alternative to the traditional mechanical differential.
Active Differential Control for precise driving
ADC is fully automatic and can vary its locking torque (and
therefore the proportion of torque sent to each driven wheel)
depending on surface conditions and power applied. Its subtle
control strategies optimise traction at each wheel, improving
acceleration on low-grip surfaces but also potentially improving
stability when required.
Working with other systems such as traction control and the ABS
braking function, ADC can significantly improve overall vehicle
performance, and provide more precise driving feel.
While the less powerful XK models do not adopt the Active
Differential Control of the XKR, they do still utilise a new
upgraded mechanical differential, which delivers outstanding levels
of grip and stability under power.
The Dynamic Stability Control system for the new XK range has
bespoke tuning and offers four driver-selectable modes, Normal,
Winter, Trac DSC and DSC OFF on all models. Normal mode is ideal for
everyday driving and is the default setting activated automatically
on starting. The Winter mode is designed to improve drivability and
confidence in more slippery conditions. Trac DSC mode is a sportier
setting allowing the experienced driver fully to exploit the cars
performance and enjoy greater involvement in controlling it. DSC OFF
allows the driver (where circumstances are appropriate) to switch
the systems electronic protection off completely, by pushing the
DSC control button for 10 seconds.
User-friendly technology and driving aids
The new XK and XKR, in both coup and convertible form, offer a
number of other driver aids that exploit the latest advanced
technology. Staying faithful to its well-established principles,
Jaguar uses these technologies to empower, not overpower the user
enhancing enjoyment rather than risking high-technology overkill.
Among the new XK ranges practical features are intelligent front
lighting incorporating bi-xenon automatic headlamps with power wash;
dynamic headlamp levelling; corner lights that are activated by the
direction indicators to improve visibility while cornering; and the
option of Active Front Lighting.
Standard equipment across the new XK range also includes air sensors
to optimise cabin air quality through the climate control system,
keyless start, cruise control, electro-chromatic fold-back exterior
mirrors, and front and rear Park Assist.
As well as the convertibles hidden, automatic roll-over protection,
every car in the new XK range features Jaguars pedestrian
deployable bonnet system (not fitted to Federal market cars). In the
event of a collision with a pedestrian, the system raises the bonnet
by 170mm in just 30 milliseconds to provide a clear space between
the surface of the bonnet and the hard points underneath, to reduce
the severity of injuries particularly those to the head while
still allowing the new XK low bonnet line. An energy-absorbing
bumper system also helps minimise lower leg injuries to pedestrians.
Jaguars Emergency Brake Assist is standard on the new XK and
Advanced Emergency Brake Assist is fitted to all models with
Adaptive Cruise Control (ACC). Advanced Emergency Brake Assist uses
the ACC radar to calculate distance from and speed of approach to
the vehicle ahead and pre-charges the brake-line pressure to
minimise impact speed if a collision is predicted with an audible
warning to the driver.
Every model in the new XK range includes front, side and thorax
airbags, incorporating new technology which reduces the load on the
occupants body if the front airbag is deployed. Jaguars Adaptive
Restraint Technology System checks for seat occupation and seatbelt
use, seat position, and the direction and severity of any impact,
and uses all that information to determine the appropriate level of
airbag deployment in any incident. Additionally, Jaguars Protec
front head restraint system can minimise whiplash in the event of a
The new XK range introduces five new alloy wheel designs, some of
them replacing earlier designs, some completely new additional
choices. Together, they bring the total number of alloy wheel
options on the new XK range to seven.
The standard wheel specification is dependent on market and model,
but for most markets begins with Jaguars 18-inch seven-spoke Venus
design on XK models. The new 19-inch 10-V-spoke Caravela wheel is
now standard on XK Portfolio and optional on XK.
Again, depending on market, the all-new 19-inch 10-fan-spoke Artura
design is available in painted or chromed finishes and in
conventional or run-flat types, and these Artura wheels are offered
as options on XK, XK Portfolio and (in run-flat form) also on XKR.
Another all-new wheel, the 19-inch ten-spoke Tamana design, becomes
standard equipment on XKR for most markets other than the UK (which
specifies 20-inch wheels), and is unique to this model.
A new 19-inch mini-spare is introduced as standard equipment for the
XKR, while the weight and space-saving Instant Mobility System still
takes the place of a spare wheel on other models in European markets
and where 18-inch wheels are fitted as standard.
Distinctive 20-inch wheels continue as a very sporty option across
the new XK range emphasising the cars sporting dynamics and
assertive, muscular looks. The new designs include two 20-inch
wheels: the twin-five-spoke Kalimnos will be standard on the XKR in
the UK market, and optional for all XK models in other markets. The
twin-seven-spoke R Performance Nevis design is a unique option for
the XKR, and another addition to the wheel range.
With the recent addition of new options Claret, Spectrum Blue, and
Kyanite Blue, the stunning exterior colour range for the new XK, XK
Portfolio and XKR is extended to 15; two of which Salsa and
Kyanite Blue are reserved exclusively for XKR.
In true, contemporary Jaguar fashion, a great deal of relevant and
intuitive technology is controlled by the clear and elegant
seven-inch Touch-screen in the centre console which is standard on
all models. The Touch-screen provides access and control for the
Climate Control and Audio systems, for the Satellite Navigation
System, for Bluetooth mobile connectivity, and for Jaguars Portable
Audio Interface which are all standard equipment. The satellite
navigation system offers DVD mapping, postcode entry, and a traffic
message channel. The Portable Audio Interface offers iPod
connectivity, and the connection of other storage devices through a
USB port, to the in-car sound system, with full Touch-screen
The audio system options for the new XK range include single-slot or
multi-disc CD changers and either Jaguar Premium Sound or the
ultimate, a high-end Bowers & Wilkins system. The Bowers & Wilkins
option is a 525-watt system with Dolby ProLogicII Surround Sound,
three-channel stereo with unique amplifier, Kevlar mid-range
speakers with high output and low distortion, and specially designed
Depending on market, a number of Digital Radio options are
available: HD radio is available for North American market cars,
SDARS satellite radio for North America and Canada, and Digital
Audio Broadcasting (DAB) is offered in selected European markets.
Ease of ownership
For all, their performance and luxury, the new XK range is designed
to be remarkably easy to live with. Both naturally aspirated and
supercharged versions of the new 5.0-litre AJ-V8 Gen III engine
offer extended service intervals now at one year or 15,000 rather
than 10,000 miles. All new
XKs now feature oil quality and brake pad wear indicators, allowing
those critical areas to be easily monitored on a regular basis by
the driver. And in the event of an accident, bolt-on front and rear
sections help to minimise repair costs.
The XK has always been an exceptional sports car. Now, it has
evolved into something even more exhilarating, combining Jaguars
legendary performance, new advanced technologies and crafted luxury
to create a sports car without parallel.
Russ Varney, Chief Programme Engineer, XK Series