hp per liter
(from Porsche press
release) Next generation Porsche Boxster unveiled at Los
Angeles Auto Show
In 1948, the 356 was the first sports car to bear the Porsche name,
and in July that year the lightweight mid-engined roadster achieved
its first motorsport victory. In 1953, the Porsche 550 Spyder was
launched. This agile, lightweight race car was powered by a high
performance ‘boxer’ engine which took it to countless international
Through 60 years of automotive evolution so much has changed. Yet
every Porsche Boxster is built on these first principles. Sports
performance, lightweight construction, agility and pure driving
pleasure. The technology Porsche use may have developed, but the
company’s ability to produce a two-seat, mid-engined sports car
unlike any other on the road remains.
This week, Porsche is presenting the second generation of the mid-engined
Boxster roadster at the Los Angeles Motor Show (November 21 – 30).
The highlight of the new generation is the new flat-six ‘boxer’
engines, developed with new technical features from the ground up,
providing not only more power, but also significantly greater fuel
A further improvement of both fuel economy and performance is
guaranteed by the Porsche Doppelkupplungsgetriebe (PDK), the new
double-clutch gearbox now available as an option on both the Boxster
and Boxster S.
Newly-developed ‘boxer’ engines
deliver more power on less fuel
the engine of the Boxster develops 255 bhp (188 kW) in the Boxster,
an increase of 10 horsepower over the prior 2.7-litre model.
The 3.4-litre power unit in the Boxster S now features Direct Fuel
Injection, and delivers 310 bhp (228 kW), up by 15 bhp.
An impressive power-to-weight ratio imbues the two Boxster models
with optimum driving dynamics. For example, with the new six speed
manual transmission fitted as standard, the Boxster accelerates from
0-62 mph (100 km/h) in 5.9 seconds. And the Boxster S, when fitted
with PDK transmission and Launch Control (featured in the optional
Sports Chrono Package Plus), accelerates from 0-62mph (100km/h) in
When combined with PDK, the new 2.9-litre engine fitted to the
Boxster clearly breaks through the 30.0mpg fuel consumption
boundary. Indeed, the figure of 31.0mpg (9.1 litres/100km) is
approximately 10 per cent better than the previous model with the
Tiptronic S automatic transmission. Increasing fuel economy by an
even more significant 15 per cent to 30.1mpg (9.4 litres/100km), the
3.4-litre Boxster S with PDK offers an even greater saving over its
predecessor with Tiptronic S.
In parallel with the improvement in fuel economy, so emissions of
the engines have decreased also. Depending on model, emissions have
been reduced by up to 16 per cent. The Boxster with the standard
six-speed manual gearbox emits 221g/km CO2, and 214g/km CO2 when
fitted with PDK. The Boxster S manual emits 223 g/km CO2, and 221
g/km CO2 with PDK.
Significantly, these developments move every Boxster model – whether
manual or PDK – into Band F for Vehicle Excise Duty and company car
Direct Fuel Injection standard on
3.4-litre S engine
The driver benefits from
a further advantage of direct injection every time they touch the
throttle pedal: with fuel being injected fractions of a second prior
to combustion, the engines respond more directly and spontaneously
to even the slightest movement of the driver’s right foot. This is
not only the case when accelerating, but also when lifting off the
throttle, for engine speed drops more quickly and smoothly since
there is no residual fuel left in the intake manifold which might
otherwise prolong the combustion process.
Depending on engine load and speed, fuel is injected into the
combustion chamber at a pressure of 120 bar. The big advantage is
that unlike conventional intake manifold injection, direct fuel
injection serves to form the fuel/air mixture directly in the
combustion chamber. This better mixes the air and fuel in the
cylinder, establishing an important prerequisite for clean and
complete combustion. This ensures the ‘homogeneous’ operation of the
power unit with a consistent balance of the fuel/air mixture in the
combustion chamber at all times and under all running conditions.
Such smooth operation guarantees optimum combustion and maintains
low emissions, across a range of fuel qualities.
Design emphasises performance
The seamless blend of
function and design has always been the Porsche philosophy. The
result is a design consistency which is recognisable from every
angle. A design which is both powerful and refined, and whose lines
emphasise its sports performance.
The evolutionary styling of the next generation Boxster embodies
these principles. The latest models are clearly distinguishable from
outside through their newly-designed nose and tail. The new halogen
headlights with their integrated direction indicators are
reminiscent of the lights on the Carrera GT, while at the rear, new
LED lights taper to the outside and are integrated elegantly in to
the restyled bodywork.
The rod-shaped side lights in LED light conductor technology add
distinction to the car’s looks, which are further enhanced through
their horizontal arrangement in the outer air intakes. Yet a further
highlight is provided by the rectangular fog lamps featured as
For the first time, the Boxster is available with a Lights Package
featuring bi-xenon headlights, dynamic cornering lights and LED
day-time driving lights. Replacing the fog lamps, these light units
are made up of four LEDs positioned next to one another.
PDK: shifting gears more quickly,
reducing fuel consumption
The new Boxster models
are available with the Porsche-Doppelkupplungsgetriebe (PDK) carried
over directly from motor sport, and replacing the former Tiptronic S
torque converter automatic transmission. When equipped with PDK, the
Boxster accelerates from 0-62mph (100 km/h) 0.1 seconds faster than
with the manual six-speed gearbox.
Acceleration is particularly fast and dynamic with the optional
Sports Chrono Package Plus featuring Launch Control; this offers
maximum acceleration from a standing start and also a Race Track
Gearshift Strategy for the fastest conceivable gear change as an
exclusive highlight on the PDK models.
Benefiting from Launch Control, the respective models accelerate
from a standstill to 62 mph (100km/h) a further 0.2 seconds faster.
Porsche Doppelkupplungsgetriebe (PDK)
– in detail
The next generation
Boxster and Boxster S are available for the first time with the new
Porsche Doppelkupplungsgetriebe (PDK), literally Porsche
double-clutch gearbox. Offering no less than seven forward gears,
the new gearbox combines the driving comfort of a torque
converter-equipped automatic transmission with the dynamic manual
gearshift functionality of a sequential racing gearbox. PDK also
boasts an entirely automatic gearshift function, and replaces the
Porsche Tiptronic S automatic transmission previously offered.
Through its optimised and adaptive gearshift programmes, PDK further
improves the acceleration of the Boxster models and reduces fuel
consumption to an even lower level.
In principle, the PDK consists of a conventional manual gearbox and
a hydraulic control system divided into two separate transmission
units. Two wet clutches in radial arrangement, controlled
hydraulically, and using oil for both cooling and lubrication, form
the heart of the transmission. One clutch is for the first
transmission unit with the uneven gear ratios (1,3,5,7) and reverse,
and the other clutch is for the second transmission unit with the
even gears (2,4,6). Via a number of pressure valves, the hydraulic
control unit masterminds both the wet clutches and the shift
cylinders activating the transmission ratio required.
The gearshift perceived by the driver comes not from the gears
actually changing, but from the change of positive clutch
engagement. In this case, the clutch on one transmission opens or
disengages while the clutch on the other transmission closes or
engages in a simultaneous process. The big advantage is an even
faster gearshift than with a conventional manual gearbox or torque
converter automatic transmission. The gears are already ‘in mesh’
when shifting and the power of the engine need not be interrupted in
PDK also reduces to a minimum transmission power loss courtesy of
the high standard of mechanical efficiency in the double-clutch, and
this manifests itself in fuel economy improvements of approximately
13 per cent compared with a conventional Tiptronic S transmission.
PDK also offers an advantage in terms of weight – despite two
additional gears, it weighs 10kg less than Tiptronic S.
To use the various functions of the double-clutch transmission, the
driver can either shift gears by means of sliding toggles on the
spokes of the new steering wheel, or via the new gear selector
lever. The driver can press forwards to shift the gears up, and
press them from behind to shift downwards. Alternatively, pushing
the gear selector lever forwards shifts up a gear, and pulling it
back shifts down. The option of PDK costs £1,961.
This PDK gearshift principle was first developed by Porsche for
motor sport 25 years ago. Porsche works drivers benefiting from this
technology were able to accelerate faster than their competitors and
keep both hands on the steering wheel while changing gears, thus
avoiding even the slightest distraction while shifting.
The seven-speed PDK shifts gears up to 60 per cent faster than a
conventional automatic transmission, and naturally, gives the new
Boxster models even better performance. And those in search of
optimum driving dynamics have the option to combine PDK with Sport
Chrono Package Plus, now featuring Launch Control.
Dynamic suspension and supreme
brakes – a new option of limited-slip differential
The suspension with its
new set-up gives the next generation Boxster models a combination of
even greater driving dynamics and enhanced comfort all in one.
Modification of the valve control map on the steering gear serves
furthermore to reduce steering forces, giving the Boxster more agile
and spontaneous steering behaviour.
The wheels come in new designs and are half an inch wider on the
Boxster 2.9-litre model than in the past in order to accommodate the
larger brake system of the S-models, which are now fitted on the
front axle. The Boxster and Boxster S feature the latest generation
Porsche Stability Management (PSM) now offering two new functions:
Brake Pre-Loading and the Brake Assistant. Whenever the driver lifts
off the throttle pedal very quickly – which is typical immediately
prior to an emergency braking manoeuvre – the PSM hydraulic control
unit builds up an appropriate level of pressure in the brakes before
the driver even presses the pedal down, which has the effect of
moving the brake pads slightly towards the discs for immediate
action. This significantly improves brake response and shortens
stopping distances accordingly.
When recognising that the driver is braking in an emergency due to
very fast operation of the brake pedal and a defined brake force,
the PSM hydraulic control unit actively delivers the brake pressure
required for maximum stopping power.
In conjunction with 18- and 19-inch wheels, the new models in the
Boxster range are also available with a limited-slip differential on
the rear axle. Locking action is 22 per cent under power and 27 per
cent in overrun. The result is a significant improvement of both
traction and stability providing a substantially higher level of
performance on winding roads, particularly on the race track. Yet a
further advantage is the more stable load change behaviour. At the
same time, the mechanical limited-slip differential, through its
particular function, interacts perfectly with the electronic ABD
Automatic Brake Differential for optimum traction control, the
locking action delaying the tendency of one wheel to spin on a road
surface slippery only on one side.
New audio and communication
The next generation
Boxster features as standard the new CDR-30 CD radio. The new
Porsche Communication Management (PCM) 3.0 complete with hard disc
navigation serves is available as an option, and when specified
adopts the role as the central control unit for all audio,
communication and navigation features.
PCM 3.0 is now more versatile, efficient and easier to use than
before, standing out in particular through its touch-screen control
which enables the driver to select specific functions simply by
pressing the appropriate key on the larger 6.5-inch monitor. PCM 3.0
is available with highly convenient voice control and, in
conjunction with the optional, universal audio interface, can now be
used also to control external audio sources such as an iPod®. USB
stick or Bluetooth.
Enthusiasts of all-weather, open-topped motoring will also
appreciate the option of seat ventilation combined with seat