Space for the generously dimensioned brake system is created by 8.5 J x 18 cast aluminium wheels of 9-spoke design with tyres of size 255/40 R 18. As an option the Audi RS 6 can be ordered with 9 J x 19 aluminium wheels in the new 5?arm design, fitted with tyres of size 255/35 R 19. The 5-spoke wheels for winter tyres are of the 7.5 J x 18 dimension and, with substantial 225/45 R 18 M+S tyres even at this time of year, ensure optimum traction and handling.
The Audi RS 6 is fitted with a tyre pressure monitoring system as standard. This monitors the tyre pressure of the four wheels during the journey, including the factory-fitted winter wheels. Any variances in pressure are immediately indicated in the driver's display.
The swivel bearings and the control arms of the four-link front suspension are of aluminium to reduce the unsprung mass. The spring/shock absorber units and elastokinematics have been retuned to suit the altered axle weights and modified axle geometry in order to achieve sporty handling. A solid anti-roll bar and the rack-and-pinion steering with a direct ratio also contribute towards the vehicle's distinctly sporty handling. A double-wishbone axle with anti-roll bar is fitted at the rear.
Entering a new dimension of handling with DRC
The Audi RS 6 is the first model to be equipped with the innovative suspension concept Dynamic Ride Control (DRC). This integral roll and pitch-compensating facility consists of a special damping system that counteracts these movements of the vehicle body immediately without the use of electronics. When steering into and around a corner, the damper characteristic is changed in such a way that movements of the body around the longitudinal axis (rolling) and the transverse axis (pitching) are significantly reduced.
The single-tube shock absorbers on the same side of the vehicle are connected with the diagonally opposed dampers on the other side via two separate oil lines, each with a central valve. The DRC valves fitted in the proximity of the rear axle provide the required compensation volume by means of inboard pistons with the pressure chamber situated behind.
When steering into and around a corner, oil flows between the diagonally opposed shock absorbers via the central valve and generates additional damping force.
When the suspension is compressed on one side, the damper characteristic is consequently modified in such a way that rolling or pitching movements are almost entirely eliminated. As a result, this alert damping system ensures that the Audi RS 6 maintains extremely good tracking stability when cornering.
If the suspension is compressed on both sides, the conventional damping is active. This guarantees a level of ride comfort that is unusually high for a sports car.
DRC suspension provides for exceptional agility, a precise steering response and neutral self-steering behaviour even when cornering at high speeds. The Audi RS 6 thus offers new dimensions to drivability for road-going vehicles.
The Electronic Stability Program, fitted as standard on the Audi RS 6, does likewise. The latest-generation ESP has been programmed for an overtly sporty driving style. Even if the driver has a very dynamic style, it does not intervene until a late stage and then only briefly.
The functions ABS with EBD (Electronic Brake-force Distribution), EDL (Electronic Differential Lock with active brake control), ASR (Anti-Slip Regulation) and the higher-level yawing-moment control are integrated and form a comprehensive safety package. The engine drag torque control system MSR opens or closes the throttle valve, thus adapting the engine braking effect to the requirements of the current driving situation.