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Introduction
The suspension system of the Audi TT RS makes use of the excel-
lent qualities that have become a hallmark of the basic Audi TT
design.
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Running gear
Front axle
The front wheel suspension system, with a track width of
1555 millimetres, adheres to a proven formula: a McPherson
structure with triangular lower wishbones. The pivot bearings, the
subframe and the wishbones are made from aluminum.
To increase rigidity, the subframe is bolted to the body at six
points.
Rear axle
The four-link rear axle (track width: 1546 millimetres) is able to
absorb longitudinal and lateral forces separately thanks to its
sophisticated design. The longitudinal links absorb the driveline
and braking forces, and their relatively soft mounts permit good
ride comfort. On the other hand, the three wishbones per wheel –
the spring link, the upper wishbone and the tie rod – are attached
very rigidly to the subframe to enhance handling dynamics.
The elastokinematic behavior of the rear control arms (all of which
are made from high-strength steel grades) has been slightly modi-
fied compared with the basic technical configuration. Separate coil
springs and newly developed dampers provide vertical support.
The body of the TT RS has been lowered 10 millimetres compared
to the volume TT model. Audi's designers have tuned the set-up to
perfection in the course of exhaustive testing, including endless
high-speed laps of the Nürburgring North Loop.
Steering
The rack-and-pinion steering system comes with variable servo
assistance; its characteristics have been adapted to the dynamic
character of the TT RS. Because the electromechanical system does
not use up energy when the car is driving in a straight line, it is
highly efficient and saves about 0.2 litres of fuel per 100 km.
The ratio of 16.9:1 is sporty and direct.
