liter TFSI 4-cyl hybrid
hp @ 5500 rpm
107.1 hp per liter
(from Audi Press
Release) At the Tokyo Motor Show (24.10. - 11.11.2007)
Audi is unveiling the metroproject quattro, an original,
characteristically Audi design study for the sub-compact segment.
The three-door four-seater car blends dynamic styling with exemplary
economy of space and supreme quality in trailblazing fashion. At the
same time, a series of visionary technical solutions take
efficiency, dynamism and motoring pleasure into new territory as
only Audi knows how.
The drive unit for the metroproject quattro showcases a fully
independent, innovative hybrid technology. At work under the bonnet
is a 1.4.litre TFSI engine developing 110 kW (150 bhp), whose power
is directed to the front wheels by means of the S-tronic Direct
Shift Gearbox. A 30 kW (41 bhp) electric motor positioned on the
rear axle is able to deliver up to an additional 200 Nm of torque
when the vehicle is accelerating. When boosting, in other words
driving the vehicle simultaneously by TFSI and electric motor to
achieve a dynamic driving style, the study is transformed from a
front-wheel-drive car to a quattro, and power is transferred to the
road in the most effective way possible.
The electric motor is furthermore capable of powering the vehicle
alone for zero-emission driving in residential areas, for instance.
The capacity of the lithium-ion batteries gives the vehicle a range
of up to 100 km in pure electric mode; the motor can be recharged
from any power socket. The automatic start/stop facility, energy
regeneration and phases of purely electrical operation reduce the
fuel consumption and emissions of the Audi metroproject quattro by
around 15 percent compared to when it is running exclusively on the
combustion engine. Despite its sporty performance (0-100 km/h in 7.8
seconds, top speed of 201 km/h), the study uses just 4.9 litres of
premium fuel for every 100 km, while CO2 emissions average a mere
The concept car's
styling is simple and coherent, making it look as if it has been
cast from a single mould. The basic proportions, with a high vehicle
body and a flat window area bordered by a coup-like roof line,
produce a virtually classic look for a vehicle bearing the four
rings. Tracing the roof's silhouette are two striking, sturdy
aluminium arches which run along the top edge of the windows to
connect the A and C-posts, further emphasising the dynamic appeal of
the powerfully built, compact vehicle body. The tail is rounded off
by a spoiler integrated into the rear window.
The side-on view presents another typical coup attribute in the
form of doors with frameless windows and no visible B-pillar. The
bold segmentation of the study's side panelling with its gently
rising shoulder line accentuates the styling.
The shoulder line of the Audi metroproject quattro with its Racing
Red paint finish is a new interpretation of yet another trademark
feature of the current Audi design. Here, the prominent double lines
continue around the entire vehicle as a curvaceous band that links
the front end from which it seems to emerge with the vehicle's
tail, that rises to create a slightly wedge-shaped effect. At the
front, the metroproject quattro's lowered bonnet that is virtually
embedded into the shoulder line forms a novel styling element.
The single-frame grille with its chequered-flag look and four
interlinking rings leaves no doubt as to the study's sporty
temperament, an impression that is further underlined by the
aluminium finish on elements such as the grille, mirror housings,
door handles, fuel filler cap and tailpipes.
The design of the three-dimensional main headlights in innovative
LED technology is especially eye-catching. The reflectors focus the
light emitted by each diode to create a powerful, uniform beam whose
white light colour barely places any strain on the driver's eyes,
even when driving for long distances at night.
The daytime running lights are also based on LED technology, which
promises extra-low energy consumption in addition to its design
The two-tone multipiece wheels that have been embellished by the
V-shaped polished aluminium elements lend further emphasis to the
vehicle's sportiness and exclusiveness.
The wraparound tailgate joins the sides with the tail. The
sculpture-like tail lights with their three-dimensional glass lens
design extend far into the vehicle's flanks. When the tailgate is
opened, the discreetly illuminated electric motor can be viewed
through a glass panel, in similar fashion to the R8's engine. The
luggage compartment itself holds a respectable 240 litres.
The body of the Audi metroproject quattro makes optimum use of the
modest-sized footprint of a premium compact-class car. Measuring
3.91 m long and 1.75 m wide with a wheelbase of 2.46 m, it succeeds
in combining sporty looks with impressive economy of space thanks to
its short overhangs. The transverse installation of the engine also
has a significant role to play in this respect. Meanwhile, the
vehicle's height of 1.40 m means there is plenty of headroom in the
The interior, with its
four individual seats and a surprisingly generous amount of
spaciousness for this class, has a tidy, no-frills appearance. The
curving wrap-around element merges the doors and the sporty cockpit
into a single whole. The dashboard and centre console are designed
entirely around the driver. Ergonomics and aesthetics unite to
create an ambience of clear-cut architecture and high-class appeal.
This impression is further enhanced by the two-tone colour concept.
The instrument cluster shroud, the wraparound and the centre console
are trimmed in a contrasting colour to inject the interior with
added dynamism. Details such as the air vents and air conditioning
controls seem to be straight out of a jet plane. This same thinking
was behind the soft finish of the interior's surfaces. The round
dials and the air vents, which are also circular, are reminiscent of
a classic sports car cockpit la Audi TT.
The aluminium insert in the centre console comprises the Audi mobile
device as well as the start/stop button behind the gear lever. In
the rear portion of the centre console can be found a thermos flask
featuring an innovative cooling and heating system.
The sporty seats with integrated head restraints offer levels of
comfort and ergonomics that far exceed the customary standards in
the sub-compact class and live up to the expectations of a typical
The materials used for both the seat upholstery and the interior
trim appeal with their high-class looks and feel. The contrasting
colour scheme featuring dark panels and red stitching adds substance
to the cars overall sporty character.
Audi mobile device form and
The centre console
houses a new, innovative technology: the removable Audi mobile
device. This portable unit functions as an access authorisation
system for the vehicle, mobile phone, navigation unit and audio and
video player all in one. Plus, it serves as the control unit for
numerous vehicle systems which can also be set from outside the Audi
metroproject quattro. The mobile device offers the entire range of
functions and exact same menu navigation as the MMI system and
integrates a host of communications devices that were previously
only available separately into a single, extremely space-efficient
This allows the driver to use the compact device as an MP3 player,
for example, or as an address database and input tool for the
navigation system. What's more, he can switch on the vehicle's
heating if required and program the sound system to suit his
personal preferences, all from the comfort of his own home. Access
and start authorisation for the Audi metroproject quattro is also
provided by the Audi mobile device, dispensing with the need for a
The unit is operated using a touchscreen, whose architecture
replicates the MMI standard. The touch-sensitive screen is capable
of recognising both Latin and Japanese characters, and is even able
to decipher handwriting. The Audi mobile device and vehicle
communicate via a WLAN connection.
The Audi mobile device also offers the vehicle owner an extra
security function: images from a camera in the vehicle interior can
be received on the device's display in real time. If the vehicle
alarm is triggered, the system activates itself and warns the owner.
Should the vehicle be stolen and move out of the WLAN connection's
range, the electronics automatically switch to the car phone's UMTS
transmitter to keep the owner informed of the vehicle's current
The MMI control unit is an advanced version of the tried-and-trusted
MMI design whose haptics make it easier to operate whilst on the
move. Grouped around the central control button are four
fixed-function hardkeys for the Navigation, Telephone, Car and Media
basic menus. Four additional, backlit softkeys have variable
functions which change within the individual menus.
The projected softkey labels combine with the bold softkey colours
that identify the corresponding menus to ensure swift, intuitive
Compared to the series-production variants, the system's display
seems relatively small at just 1.5 inches high. This is because all
system information additionally appears in the central display in
the instrument cluster. The instrument cluster has a hybrid design,
featuring both TFT modules as well as analogue gauges for the large
speedometer and rev counter dials. Superimposed glass elements make
the graphics stand out with a three-dimensional look, producing a
level of depth which could never be attained using a standard
The layout of the MMI display likewise features a new element. The
selectable functions are arranged in a semicircle as icons. As the
driver turns the central MMI control button, the icons mimic the
movement until the desired function is selected by pushing the
button. Content can therefore be communicated by means of a
distinctive visual language, allowing it to be grasped faster and
more intuitively than with pure text.
Audi drive select
The Audi metroproject
quattro is equipped with the same Audi drive select system that can
be ordered as an option for the current generation of the
bestselling Audi A4. This enables the driver to pre-select one of
two specially adapted configurations for the drivetrain, shift
characteristics and magnetic ride shock absorbers.
The default setting is the "efficiency" mode, which is automatically
activated every time the engine is started. In this mode, the engine
and transmission respond gently to use of the accelerator and shift
paddles. This setting is ideal for a relaxed driving style, as well
as offering tremendous potential for effectively lowering fuel
consumption, and therefore emissions too.
In the "efficiency" mode, the electric motor is not deployed as a
source of additional torque; instead it is run selectively as the
sole power source to bring about a tangible reduction in
consumption. For this purpose, the system makes use of a host of
parameters which can be fed to it via the navigation system.
Thanks to the navigation system's ability to detect differences in
altitude along the route, regeneration phases as well as the
increase in energy requirements on inclines can be computed before
the journey has even started. This also makes for particularly
efficient vehicle operation by harnessing the electric motor to
On predefined routes with access to a mains power socket at the
destination, the Audi metroproject quattro can cover distances of up
to 100 kilometres running purely on electrical power and swiftly
too: it is capable of reaching a speed of considerably more than 100
km/h. The combustion engine only cuts in again once battery capacity
has dropped to below 20 percent of maximum.
The "efficiency" mode also flashes up messages in the central
display advising the driver to deactivate energy-intensive systems,
such as the automatic air conditioning's compressor, or close any
The dynamic mode is designed to produce the dynamic yet comfortable
driving sensation that is so typical of the brand and that Audi
drivers have come to expect of their car. In this mode, the
vehicle's electronics also harness the torque available from the
electric motor to achieve extra-sporty acceleration along with
excellent lateral dynamics.
sportiness plus a whole new dimension in efficiency it is all down
to the novel combination of a state-of-the-art turbocharged FSI
engine with an electric motor and innovative control electronics.
Under the bonnet of the Audi metroproject quattro sits a
four-cylinder TFSI with a capacity of 1.4 litres and a turbocharger.
This engine is an advanced version of the unit that made its series
production debut in the Audi A3 only a few months ago. Whereas the
1.4 TFSI musters 92 kW (125 bhp) in the A3, it delivers 110 kW (150
bhp) at 5,500 rpm in the study. Its peak torque of 240 Nm is on tap
over a broad rev band from 1,600 4,000 rpm.
The Audi engineers have long since proven the performance potential
of turbocharged FSI technology, both on race tracks around the world
and out on the road. Indeed, a jury of experts awarded the accolade
of "Engine of the Year" to the 2.0 TFSI for the third year in
succession in 2007.
The new 1.4 TFSI builds on this very same concept in order to
maximise efficiency on the one hand and performance on the other.
Multi-hole injectors result in very homogeneous mixture formation
and extremely efficient combustion. This is also an effective means
of helping to cut pollutant emissions.
The integrated turbocharger promises optimised responsiveness and
even more harmonious torque build-up. 80 percent of peak torque can
be summoned up from as low down as 1,250 rpm, in other words barely
above idling speed. And despite its power, the 1.4 TFSI sets new
benchmark standards in its class for its acoustic output too.
Front-wheel drive + rear-wheel
drive = quattro
Power transmission to
the front wheels is the task of the sporty Audi S-tronic Direct
Shift Gearbox. It allows drivers to make lightning-fast gear
changes, without a clutch pedal and without any interruption in the
power flow. Gearshifts can also be fully automated if desired. If
drivers wish to change gear manually, they can do so by using the
shift paddles mounted on the steering wheel. Reverse and Park,
meanwhile, are engaged using the shift lever knob on the centre
When running on the combustion engine alone, drive power is
delivered to the study's front wheels. If it is being propelled
purely by the electric motor, on the other hand, the vehicle is
transformed into a rear-wheel-drive car. The 30 kW (41 bhp) electric
motor transmits its power directly to the rear wheels; the
differential compensates for any slip on one side.
When the two drive units are working in unison, however, the Audi
metroproject is transformed into a genuine quattro and can count on
all the benefits of four-wheel-drive system. This ensures that the
high torque of 440 Newton metres in total 240 Nm from the 1.4 TFSI
plus an extra 200 Nm from the electric motor is transformed into
the required level of tractive power when accelerating.
Overrun, or the regeneration phase as it is known, is one of this
vehicle concepts most important instruments for optimising
efficiency: the braking energy released during deceleration phases
is transformed back into electrical energy instead of it being
released as heat and wasted.
The Audi metroproject quattro can in principle run
self-sufficiently, using mixed operation of the combustion engine
and electric motor. Thanks to intelligent control of the two drive
units, energy regeneration as well as the automatic start/stop
facility, fuel consumption drops by around 16 percent compared to a
vehicle running on the petrol engine alone. Although the components
of the electric motor add around 70 kilograms to the overall weight,
the study still only burns 4.9 litres of premium fuel per 100 km in
mixed mode, while CO2 emissions average just 112 g/km.
Pure electrical operation over shorter distances, however, is a
particularly attractive alternative offered by this vehicle that
benefits the environment and the owner's wallet alike all the more
so considering that the performance achieved in this mode and the
range of over 100 kilometres are perfectly satisfactory. "Refuelling"
the Audi metroproject quattro from power sockets alone, therefore,
produces an unequivocal result: even allowing for the relatively
high domestic electricity costs in Germany, it is still possible to
achieve a saving of around 6.50 for every 100 km or 70 percent
compared to the price of premium fuel.
The second fundamental
ingredient for outstanding handling dynamics is supplied by the
sophisticated chassis design, comprising McPherson front suspension
and four-link independent rear suspension. Large 18-inch wheels with
size 225/35 R18 tyres boost both driving pleasure and safety.
The dynamic chassis is tuned for sporty, agile handling combined
with excellent stability, and makes cornering a particular delight.
What's more, the chassis excels with a level of ride comfort
befitting of higher vehicle classes.
The braking system with its large-diameter discs (measuring 312 mm
across at the front wheels) is more than a match for the drive
power. Bred on the racetrack, the system promises outstanding,
fade-free stopping power.
The electromechanical steering with speed-sensitive power assistance
is also a boon for agile handling. The system boasts optimum
steering feel combined with low sensitivity to road surface
excitation and a considerable reduction in energy consumption.
The specific strengths of the four-link suspension stem from the way
in which it splits the functions for absorbing longitudinal and
lateral forces. This permits a high level of lateral rigidity on the
one hand for optimum dynamism and driving safety, while offering a
great degree of longitudinal flexibility on the other to improve
The shock absorbers deploy a highly innovative technology in the
form of Audi magnetic ride, which has already made its mark in the
Audi R8 high-performance sports car and in the TT. Here, the
conventional shock absorber fluid is replaced by a magneto-rheological
fluid whose viscosity can be controlled by means of an
electromagnetic field. This effect allows the damping
characteristics to be adapted electronically at any time by
energising the electromagnets.
Audi magnetic ride capitalises on this quality to make the
appropriate damping forces available in any driving situation,
thereby optimising both ride comfort and performance dynamics. A
computer linked up to a system of sensors interprets the current
driving situation with split-second speed. At the same time, drivers
are able to choose between two different drive modes, depending on
whether they wish to have a distinctly sporty drive with the
magneto-rheological fluid at a low viscosity or a more