The new TT RS uses quattro permanent all-wheel drive. The electro-hydraulic multi-plate clutch is compact and lightweight – its position at the end of the propeller shaft benefits the axle load distribution. The new quattro driving dynamics software continually computes the torque that is distributed to the rear wheels. Compared with the previous model, this is done even more precisely, because the control system is able to take into account the driving state more precisely. The TT RS is more agile as a result. The software records the rear axle torque and, based on this, calculates the electricity that controls the electronically controlled oil pump. The resulting hydraulic pressure pushes together the plates with up to 40 bar of pressure and thereby transfers the torque to the rear axle.
If the new TT RS is cornering at high speed, the clutch can redirect some of the propulsive power to the rear axle when turning into the corner. During load changes, the distribution of torque ensures that the TT RS turns precisely into the corner.
At the limit, the quattro drive operates in close tandem with wheel-selective torque control, an intelligent software feature of the Electronic Stabilization Control (ESC). This brakes the inside wheels ever so slightly, enabling them to transfer more lateral force. Handling is more fluid and stable as a result.
The developers have applied RS-specific tuning to the Electronic Stabilization Control (ESC) and the anti-slip control. In addition to the full mode, there is also a sport setting where the ESC intervenes later. This mode provides greater driving pleasure, and also enables controlled drifts on low-friction road surfaces. If the driver pushes the button for longer than three seconds, the ESC switches off completely to allow particularly sporty handling.
The quattro drive is integrated into the Audi drive select dynamic handling system for the first time in the TT RS. The modes available are comfort, auto, dynamic and individual. These also influence the function of the seven-speed S tronic, steering, engine characteristic and exhaust flaps. In dynamic mode, the multi-plate clutch sends the power to the rear axle earlier and to a greater degree. The characteristic of the aforementioned technical components can be freely configured in individual mode.
Top technology for high driving pleasure: the RS sport suspension
Targeted modifications make the suspension with the technically elaborate four-link rear axle even more precise. The progressive steering features sporty, RS-specific tuning. Its steering rack is designed so that the steering ratio becomes increasingly direct when turning. The new TT RS can thus be moved agilely with little steering effort and remains calm and collected when cornering. The progressive steering provides the driver precise road feedback the entire time.
The setup of springs and dampers is taut; the body is ten millimeters (0.4 in) lower than on the Audi TT. The same is true for the RS sport suspension plus with Audi magnetic ride.
It uses a special hydrocarbon fluid with microscopically small magnetic particles and a magnetic field to vary damping in the stages auto, comfort and dynamic via Audi drive select. In dynamic mode, this enables even more spontaneous handling. The wheels are precisely braced during cornering and body roll largely suppressed. Audi magnetic ride counters body pitch during braking.
Powerful combination: wheels and brakes
The TT RS Coupé and the TT RS Roadster come standard with 19-inch cast wheels in a five-arm polygon design with size 245/35 tires. As an option, Audi supplies 20-inch forged lightweight wheels in a 7-spoke rotor design and tires of size 255/30. Both wheel types are available in silver, matt titanium look or gloss anthracite black. The recessed hubs of the 20-inch wheels are inspired by motorsport.
The braking system in the new TT RS packs a real punch. The internally ventilated, perforated steel discs on the front axle are 370 millimeters (14.6 in) in diameter. Stainless steel pins join the friction ring to the aluminum brake disc chambers to dissipate heat quickly. The eight-piston brake calipers with the RS logos are painted black (or optionally red). Alternatively, the front brake discs are available in carbon-fiber ceramic. They are particularly abrasion-resistant and light. In this case, the brake calipers are painted gray. At the rear, monoblock discs with 310 mm (12.2 in) diagonals are used.
The equipment, data and prices specified in this document refer to the model range offered in Germany. Subject to change without notice; errors and omissions excepted.