lb-ft @ 5,500 rpm
bhp @ 8,250 rpm
|8.6 lbs per hp
|101 bhp per litre
155 mph (electronically limited)
(from Audi Press Release) Never before has an open-top production Audi had so much power on
tap: the RS 4 Cabriolet puts the brand at the forefront of the four-seater
convertible segment. The 420 bhp V8 engine transforms the open-top
RS 4 into a veritable sports car that is also ideal for relaxed
cruising. As well as sporty performance, the RS 4 Cabriolet treats
its passengers to an acoustic experience of the finest calibre,
because the unmistakable sound of the V8 engine is enough to set the
pulse of any car enthusiast racing. Particularly with its roof open,
the hearty sound of the eight-cylinder engine reaches the occupants'
Visually, the Cabriolet is recognisable at first glance as a member
RS 4 family. The rhombus-pattern single-frame grille, the additional
air outlets and the new RS 4 wheels lend the open-top four-seater a
highly dynamic flavour.
Inside, the seats are the main feature distinguishing the RS 4
Cabriolet from the Avant and saloon. Whereas the other two body
versions are equipped with
RS bucket seats, the Cabriolet comes with sports seats as standard,
RS bucket seats can be ordered as an option. The most important
information units in the Cabriolet are combined beneath a domed
The electro-hydraulic hood can be opened entirely automatically in
21 seconds. The roof can be operated at up to speeds of 30 km/h.
This makes it possible to open or close the roof when out and about
in town, for instance, or before parking the car. The glass rear
window is heated. This guarantees a clear view
to the rear in all weather. The acoustic hood, a standard feature of
RS 4 Cabriolet, sets new standards for soft tops. New fabrics of a
higher material density and an additional cushioned mat around the
C-post keep the noise level inside the car with the hood almost on a
par with the saloon.
As with the saloon and Avant, the ride height of the Cabriolet has
been lowered by 30 millimetres compared with the A4 Cabriolet. This
emphasises the car's sporty appearance.
Even if the Audi Cabriolet's weight has been rigorously trimmed
down, in common with all other RS 4 models no corners have been cut
with either its equipment or its standards of safety.
The further improved crash strength of the latest A4 Cabriolet
generation has likewise benefited the open-top RS 4. The front and
side airbags are standard features, as are the rollover bars that
extend behind the rear seats in the event of the car overturning.
The 420 bhp V8 revs up to a speed of 8,250 rpm. With its
displacement of 4,163 cm3, this outstanding engine breaks through
the magic barrier for a production saloon of 100 bhp per litre. The
highly compact power unit reaches its peak torque of 430 Nm at 5,500
rpm. At least 90 percent of the maximum torque is available between
2,250 and 7,600 rpm. The result is excellent pulling power at all
times, enabling the driver to drive in a relaxed style without
frequent gear changes.
Audi's RS 4 saloon employs groundbreaking FSI technology. The petrol
direct-injection unit delivers enhanced power output based on more
efficient combustion of the fuel/air mixture. The engine is also
more responsive. The performance of the RS 4 clearly demonstrates
this progress: it reaches the
100 km/h mark in 4.8 seconds (Avant 4.9 seconds, Cabriolet 4.9
seconds), and 200 km/h in 16.6 seconds (16.9 seconds; 17.5 seconds).
On all three versions, the speed is governed electronically when the
needle reaches 250 km/h.
Audi has deployed the high-revving engine principle for the first
time in the
RS 4. The advantages of this principle are superior power output at
high engine speeds, a smooth power flow and eager responsiveness all
across the revs range. Further fortes are the car's outstanding
agility and fast-revving response as well as the kind of
racing-style engine sound that drivers of such cars simply expect.
As a result of these qualities, the eight-cylinder power unit
provides maximum thrust and performance in virtually all driving
situations. The constant flow of power from bottom-end speeds all
the way up to 8,250 rpm is equally appropriate for a relaxing
driving style with minimum gearshifting and for exploits worthy of
The V8 power unit is ultra-compact in its dimensions, fitting snugly
into the engine compartment of the RS 4 without necessitating any
modifications to the body. The camshaft and ancillaries, with the
exception of the alternator, are all driven by a chain for easy
maintenance. An all-new development, the eight-cylinder unit
powering the RS 4 includes such features as modified pistons and con
rods, a new crankshaft together with its bearings, and new cylinder
A dual-branch exhaust system with enlarged pipes provides even
higher power output. These extensive measures have enabled the 4,163
cm3 engine to break through the magical 100 bhp per litre barrier.
The car's power-to-weight ratio is also impressive: 3.93 kg per bhp
is a figure that only the most thoroughbred sports cars were able to
offer just a few years ago. The figure for the Avant is only
Audi translates the engine's power into locomotion in typical style:
the latest generation of quattro permanent four-wheel drive, which
featured first in the
RS 4 saloon and offers a asymmetric/dynamic torque split of 40
(front axle) to
60 (rear axle) in conjunction with the self-locking centre
differential, is one of the main reasons why the RS 4 is still able
to provide traction when other drive concepts have long since
reached their limits. quattro drive is further enhanced by the DRC
suspension system (Dynamic Ride Control), which significantly
reduces the rolling and pitching movements of the vehicle about its
transverse axis and rear axle.
The 30 millimetre lower ride height compared with an Audi A4, the
wider track at the front and rear axle and the sporty spring and
damper settings help the
RS 4 to meet the developers' ambitious handling objectives and place
it in the realm of a genuine sports car. The brakes, too, represent
new dimensions in their innovation. The 18-inch format provides
Floating, perforated, ventilated brake discs measuring 365
millimetres in diameter are fitted at the front, and there are
likewise perforated, ventilated brake discs at the rear with a
diameter of 324 millimetres. The specifically flow-enhanced brake
ventilation incorporating NACA jets on the underbody of the car
ensures optimum cooling of the brakes, however high a load they are
The latest generation of ESP has been modified specifically to suit
the particular properties of this high-performance vehicle. It now
intervenes later and for shorter periods. It is also possible to
disable the ESP in two stages. In the first stage only the traction
control (ASR) function is disabled; the other ESP functions remain
fully active. In the second stage the ESP is completely deactivated,
including the traction control. All electronic control then ceases.
The servotronic steering has been specially tuned to the
requirements of a sports car. With its direct response and short
travel, it is outstandingly well suited to the overall character of
all RS 4 versions.
Audi has likewise adapted the six-speed gearbox to the handling
requirements of a sports car. With its precision navigating through
the shift gate and its short travel, it enhances driving pleasure
and prompts the driver to change gear more often than the
universally free-revving engine actually needs.
Light and comprehensive
Although weight was one of the main considerations in the
development of the Audi RS 4, the car boasts an extensive range of
equipment. Standard features include a deluxe automatic air
conditioning system, as well as the concert radio system.
Central locking and electric windows are also featured as a matter
of course in a car of this class. The Audi parking system at the
front and rear helps avoid irritating dents and scratches when
The high-intensity xenon plus headlights provide optimum visibility.
RS logo is worked into the flat-bottomed RS sports steering wheel as
well as into the seat upholstery and door sills.
Two of the functions controlled directly from the ergonomically
RS sports steering wheel are the lap timer and the Sport button.
Dynamic Ride Control (DRC) provides sporty, dynamic handling by
significantly reducing body roll and pitch, while nevertheless
providing an exceptionally high standard of ride comfort for a
sports car. All RS 4 models come with 18-inch cast aluminium wheels
of 5-spoke design. As an optional extra, there are 19-inch wheels of
a double 7-spoke design. Here, too, weight saving is combined with
There are countless echoes of motor racing around the interior of
RS 4 models. These include the extensive use of carbon fibre and
aluminium. The engine is started at the push of a button.
In the saloon and Avant, the front passengers are accommodated on
sports bucket seats. These provide maximum support even when the car
is driven energetically, for instance round a racetrack. On these
seats, the width of the seat base and seat back can be adjusted
electrically as preferred. Even greater lateral support can be
obtained by pressing the Sport button. As well as calling up a
modified, more spontaneous throttle response and an even more sporty
sound from the exhaust system, this function inflates the seat side
sections, supporting the driver even more securely.
The Cabriolet is equipped with leather-upholstered sports seats,
which likewise provide very good support but also take the higher
comfort requirements of Cabriolet drivers into account. Here too, RS
bucket seats are available as an option.
Audi offers an extensive range of optional extras for the RS 4. They
include the navigation system plus and the symphony radio system. On
the RS 4 saloon and RS 4 Avant, various exterior mirror versions
(optionally also with fold-in function), the sports suspension plus
and the comfort package are also available. This comfort package
comprises features such as cruise control and heated front seats