The Audi R8 LMS GT4 stands for production-based racing. The race car that is directly derived from the road-approved Audi R8 Coupé V10 is powerful, offers a high level of safety yet remains economical in terms of purchasing cost and cost of ownership. It is the ideal race car for amateur campaigners, completely in line with the spirit of the GT4 regulations carrying on a great sports car tradition in which fascinating road-going sports cars were a popular base for GT racing more than half a century ago.
As quattro four-wheel drive is prohibited in the GT4 class, Audi Sport utilizes a 7-speed double-clutch transmission combined with rear-wheel drive. Two electrohydraulically operated wet-type multi-plate clutches ensure shortest shifting events without tractive force interruption. A mechanical limited slip differential is used on the rear axle.
The suspension of the road-going version featuring double wishbones on all four wheels offers perfect prerequisites for racing. Rebound and compression adjustable racing-specific dampers and springs, as well as adjustable stabilizers, complete the suspension system. A new steel disc braking system with modified brake calipers in combination with the production-level ABS control system ensures optimum deceleration. Special brake cooling ducts at the front and rear guarantee braking stability also in racing. For the steering system, Audi Sporthas adopted the hydraulic rack-and-pinion unit from the GT3 model, albeit with an electrically operated pump. In spite of the cost benefits offered by the 5-hole cast aluminum wheels they have been specifically designed for racing purposes. Audi Sportalso offers a tire pressure warning system as an option.
