The quattro all-wheel drive system of the R8 has been completely re-developed. Through a combination of its high-performance mechanical system, and software precisely tuned to the mid-engine concept, the R8 exhibits dynamic handling properties in a new dimension. The intelligent quattro all-wheel drive software delivers the ideal distribution of torque, according to the driving situation, driver inputs and outside conditions.
The electrohydraulic multi-plate clutch integrated within the front differential transmits the calculated torque to the front wheels within just a few milliseconds. The new clutch distributes torque between the axles adaptively – it does not have any fixed underlying distribution. The maximum level of torque transfer has increased significantly, ensuring the best possible traction and dynamic handling.
The quattro all-wheel drive is connected to the engine’s coolant circulation system, which utilises three large radiators at the front of the car. This solution ensures that the clutch can perform its control work precisely under all conditions. A temperature and pressure sensor continually monitor conditions and adapt control parameters as necessary. Although the multi-plate clutch operates with minimal slip – which is necessary for defined transmission of torque – it surpasses the previous viscous coupling when it comes to efficiency.
quattro drive has also been integrated into the handling system: Audi drive select. Using drive select, the driver can choose between comfort, auto and dynamic mode. The R8 V10 plus adds three new performance modes: dry, wet and snow. These new modes adapt dynamic handling parameters to the friction coefficient of the specific road surface.
The purely mechanical rear differential further improves traction and dynamic handling – it exhibits a 25% locking effect in traction and 45% in thrust. It is precisely designed for the dynamic character of the new R8 and the actively controlled quattro drive system. The result: the near elimination of understeer. The mid-engine is positioned near the vertical axis of the car’s centre of gravity, so the inertia of its mass hardly comes into play during swift changes in direction.