The chassis of the Audi RS 7 Sportback combines tremendous dynamic potential with good comfort. Up front is a five-link axle that can handle longitudinal and lateral forces separately. It comprises two transverse links on the upper plane, the support link and control arm in the lower plane, and the track rod. Its bearings respond smoothly in the longitudinal direction, and are stiff in the transverse direction for precision.
The backbone of the front suspension is the integral subframe. Made of high-strength steel, it is bolted rigidly to the front end, further increasing the latter's rigidity. The suspension control arms are aluminum forgings to keep the unsprung masses low. The wheel carriers and pivot bearings are also made of this same material. The anti-roll bar fabricated from a high-strength steel tube is also relatively light. The front track of the Audi RS 7 Sportback measures 1,634 millimeters (5.36 ft).
The rear suspension with a track of 1,625 millimeters (5.33 ft) follows the self-tracking trapezoidal link layout, which is characterized by sporty and reliable handling as well as compact dimensions. Two hydraulic bearings connect the steel subframe with the body. The overhead control arms and the track rods are aluminum forgings. A steel tube also serves here as an anti-roll bar. The two trapezoidal links are precipitation-hardened aluminum castings; the wheel carriers are of chill-cast aluminum.
The electromechanical power steering unit in the Audi RS 7 Sportback is a compact and lightweight component. Its low mounting position on a level with the center of the wheel promises agile response, high precision and sensitive feedback. The 13.0:1 ratio is sporty and direct. Steering boost, which varies as a function of speed, has been specially tuned to the character of the dynamic top-of-the-line model.
The electromechanical power steering is highly efficient because it does not require any energy while driving straight ahead. When braking on a surface that is slippery on one side, it helps the driver by facilitating the proper corrections and makes improper steering movements more difficult.
Audi offers dynamic steering with RS-typical characteristics as an option. The heart of this system is a superposition gear in the steering column. It steplessly varies the steering ratio as a function of speed, from very direct when maneuvering to indirect on the highway. At the cornering limit, it countersteers with minimal pulses, making the handling even more dynamic, fluid and safe.
The RS 7 Sportback comes standard with a sportily tuned air suspension. The RS adaptive air suspension lowers the body by 20 millimeters (0.79 in) compared with the A7 Sportback. Its damping is varied as a function of road conditions, driving style and the mode chosen in Audi drive select. The driving dynamics system integrates key components. Besides damping, these include the steering, engine management, the sound flaps in the exhaust system, the tiptronic and the optional components adaptive cruise control, sport differential, RS sport suspension with Dynamic Ride Control (DRC), dynamic steering, belt tensioners and cornering light. The driver can vary the function of these systems between the comfort, auto, dynamic and individual modes.
Tautly connected: RS sport suspension plus with DRC
The tauter RS sport suspension plus with Dynamic Ride Control (DRC) is available as an alternative to the RS adaptive air suspension. With its steel springs and variable dampers, it reduces all body motion purely mechanically and thus immediately. It is compact and lightweight. The diagonally opposed pairs of shock absorbers are linked by hydraulic lines and a central valve. When cornering at speed, the valves regulate the oil flow in the shock absorber of the deflected outside wheel almost immediately. They increase the support provided and reduce lateral tilt.
The brake system of the Audi RS 7 Sportback delivers maximum performance. The discs are internally vented and perforated. Their wave-like outer contour reduces overall weight by roughly three kilograms (6.61 lb). Stainless steel pins connect the steel discs to the aluminum brake caps. This concept borrowed from racing reduces tensions, quickly dissipates the heat and prevents the transmission of temperature spikes.
The front brake discs measure 390 millimeters (15.35 in) in diameter and are gripped by black (optionally red), six-piston calipers. Optionally available are carbon fiber-ceramic brake discs measuring 420 millimeters (16.54 in) in diameter. Their calipers are painted Anthracite Gray and bear “Audi ceramic” badges. The high-brakes are virtually fade-free, extremely durable, powerful, long-lasting and substantially lighter. The ceramic brake discs alone save 14.6 kilograms (32.19 lb) of weight compared with the steel discs.
The electronic stabilization control (ESC) has been specially configured for the dynamic profile of the Audi RS 7 Sportback. With the touch of a button, the driver can select a sport mode that deactivates the engine interventions. The ESC can also be deactivated entirely for particularly dynamic driving. A practical subfunction of the system is hold assist, which makes it easier to start out on slopes.
Machine-polished 20-inch forged wheels in seven twin-spoke design and fitted with 275/35-series tires are standard on the Audi RS 7 Sportback. Optional 21-inch wheels in five-spoke “Blade” design are available in three different versions, including machine-polished high-gloss black and machine-polished titanium-look. These wheels are fitted with 275/30 R 21 tires.
The equipment and data specified in this document refer to the model range offered in Germany. Subject to change without notice; errors and omissions excepted.