lb-ft @ 6200 rpm
110.4 hp per liter
(from AC Schnitzer
Press Release) Psychologically, tension means excited
expectation or apprehension of a proposed event which is either
particularly desired or feared.
Physically, tension describes a force within a resilient body.
Mechanical tension (symbol σ) is the force per surface unit which
acts in an imaginary section plane through a body, a fluid or a gas.
Tension is also the most important instrument of playwrights and
authors for motivating the viewer and reader to watch and read
The applicaton of all these different definitions to a single
vehicle - viewed from all aspects - is demonstrated by AC Schnitzer
at the IAA 2005 with the Concept Car:
The basis for the
extensive conversion could only be one vehicle: the 507 HP BMW M6,
which underwent a performance upgrade as the first development
stage. Optimising the entire engine management system and fitting a
new AC Schnitzer exhaust manifold system with special catalyst,
sports rear silencer with chromed tailpipe trims in right/left
combination in "Sports Trim Design" help the TENSION achieve an
incredible 406 kW / 552 HP. The Sports Trim Design will also shortly
be included in the AC Schnitzer sports rear silencer range
exclusively for the new BMW M vehicles .
Even more imposing than the pure engine power is the maximum torque
of 540 Nm at 6200 rpm, which pushes the driver back in the seat and
catapults the TENSION explosively to 100 km/h in just 4.5 seconds.
The AC Schnitzer Vmax delimiter means that the acceleration thrust
continues to 325 km/h before the speedo needle can relax - where
driving conditions allow.
Conversely of course tremendous forces are also necessary to bring
the TENSION back to a standstill. To achieve good deceleration
values, development of an AC Schnitzer high performance braking
system was essential. On the front axle this takes the
uncompromising form of an 8-pot fixed caliper with perforated and
vented brake disks in 374 mm diameter and with 36 mm thick brake
discs. On the rear axle, a 4-pot fixed caliper is used in
conjunction with the standard brake discs.
For both acceleration and deceleration, it is the wheels which are
permanently under full load in all manoeuvres. To take account
firstly of the safety aspect and secondly to fulfil the high
technical requirements imposed on the new Concept Car by our
engineers, a completely new wheel had to be developed.
The result is the AC Schnitzer "Forged Wheel": a lightweight forged
bi-colour finish, i.e. it has a part polished, part painted
surface.The forged wheel embodies an apparent contradiction:
reduction in weight with at the same time the largest possible
diameters and widths.
The TENSION is fitted with wheels size 10.0J x 20" all round. The
offsets of -12 on the front and -2 on the rear allow tyres of size
285/30 ZR 20 respctively, of type MICHELIN Pilot Sport 2.
The weight of the front wheel is approx. 10 kg and the rear wheel
10.8 kg. But the AC Schnitzer Forged Wheels are not reserved
exclusively for the TENSION. From December 2005 this new wheel type
will also enrich the AC Schnitzer range forthe BMW 5-series and
In motorsport the right Set Up often makes the difference between
first and second places, and our engineers put particular importance
on optimum chassis set-up. In the AC Schnitzer TENSION, driving
dynamics are decisively improved by the special development of an
adjustable AC Schnitzer racing suspension. As well as lowering by 30
mm in relation to its standard brother M6, the spring and damper
rates have been clearly modified towards sporting performance.
To counter lateral roll movements the AC Schnitzer antiroll bar kits
are fitted to the front and rear axles. A further suspension
highlight is the specially developed strut brace in aluminium-
carbon combination, which perfectly prevents torsion in the vehicle
The TENSION body conversion is absolutely breathtaking, and is
totally dedicated to optimising the aerodynamics. A further focal
point of the development was the improvement of the air supply and
extraction for the power plant and braking system.
The redesigned bonnet of the AC Schnitzer TENSION reveals at first
sight - through its striking power bulge and large air outlets -
that it conceals an extremely powerful engine which requires maximum
cold air flow especially at full load.
Another totally new development is the front skirt which makes the
TENSION look even lower and further increases downforce on the front
axle at high speeds. Its large air intake provides additional
cooling for the engine and front brakes, and gives the TENSION its
unmistakeable visual expression.
To provide additional venting for the V10 engine,large air outlet
openings have been provided in the new front wings, where the 3
chromed ribs and LED flashers are reminiscent of a shark's mouth.
Adequate air flow is essential for the TENSION to develop its full
potential not only in the front of the car: this principle naturally
also applies to the rear .
Consequently air ducts for the rear brakes have been worked into the
striking side skirts; these skirts not only give the TENSION a more
elongated appearance but also ensure a harmonious transition to the
huge rear .
The rear skirt accommodates not only the twin exhaust system made
totally of stainless steel with chromed Sports Trim tailpipes but
also a unique underfloor wing construction with diffuser .
The driver of the AC Schnitzer TENSION has the option of actively
changing the vehicle aerodynamics to suit his needs. This is
achieved through two interchangeable carbon diffusers which meet the
differing needs for downforce on a track or when driving on country
roads . The fast action aluminium catches mean that this conversion
can be made effortlessly by the driver and the unused diffuser can
be carried in a special holder in the boot so conversion can be
The same applies also to the rear wing of the TENSION. This too was
designed as a mobile option for the track and has its place either
in the boot or, using fast action catches, on the specially
redesigned boot lid.
The boot lid of the TENSION is a real eyecatcher even without the
rear wing . In contrast to the standard car, it comes without
integral rear spoiler , giving smoother lines to the vehicle rear.
The body concept , which makes the TENSION 25 mm wider on each side,
is complemented by the AC Schnitzer sports mirrors and the
extravagant two-colour paint in Magic Orange Metallic with Carbon
The AC Schnitzer engineers are currently planning to include in the
range a "softened" version of the TENSION aerodynamic concept for
the M6, which is now in development.
The interior of the AC Schnitzer TENSION is a combination of
developments from the AC Schnitzer range which are available for
many BMW models, and special one-off products . The latter include
amongst others the racing seats in leather with AC Schnitzer logo
and the carbon interior trim in Magic Orange . The 3-spoke airbag
sports steering wheel in leather is also fitted. The selector gaiter
and handbrake handle are finished in Alcantara with black seams .
The arm rests in the doors and on the centre console are finished in
Magic Orange leather to match the paintwork. Velours foot mats with
embroidered TENSION logo complete the interior. The aluminium
accessories consisting of pedal set, foot rests, handbrake handle
and a cover for the controller of the "i-Drive" system are however
an established part of the
AC Schnitzer range.
The AC Schnitzer TENSION was developed as a technology platform.
This Concept Car in the equipment level and form shown here would
cost around € 260,000.00. There are no plans for series production.