The RS Spyder has been developed exclusively in-house at Porsche – this being the only way of ensuring that engine, transmission, chassis and aerodynamics combine to create a harmonious overall package. In the interests of optimum driving dynamics, the vehicle concept focuses on the lowest possible centre of gravity and good traction.

Distinguishing features of the 90 degree V8 racing engine with a displacement of 3.4 litres are its low weight and low centre of gravity. The four-valve engine features dry-sump lubrication and individual throttle valves. For the 2008 season, the engine’s fuel consumption has been further optimised and even better adapted to the E10 fuel, containing 10% bioethanol, which is required by the ALMS. The long distance engine generates 478 bhp with the prescribed air-flow limiter and intake port injection. Over the course of the 2008 season, an even more highly developed engine came into use – initially by the Penske Racing team. With direct fuel injection (DFI), this engine generates 503 bhp, while also achieving a further improvement in fuel consumption.

The power unit and the transmission are integrated into the chassis as self-supporting components. The transmission takes the form of a sequential, spur-gear 6-speed dog-type constant-mesh countershaft transmission with a 3-disc carbon fibre clutch. Gear-shifting is carried out by means of buttons on the steering wheel. A mechanical locking differential and traction control provide for optimum traction.

A highly rigid carbon fibre monocoque forms the backbone of the RS Spyder together with the engine-transmission unit. The monocoque features precisely defined crash structures and an integrated safety tank cell. Double A-arms which are adjustable in height, camber and toe are employed for the front and rear wheel suspension. The springs, shock absorbers and lateral stabilisers are also individually adjustable. A brake system with dual brake master cylinders and variable brake-force distribution has been developed for the RS Spyder. The carbon fibre brake discs are 355 millimetres in diameter on the rear axle and no less than 380 millimetres at the front. The appropriate racing tyres are supplied by Michelin.

The engineering is concealed under eye-catching cladding. The design of the multi-part exterior panelling has been optimised in terms of aerodynamics and thermodynamics.  

The regulations stipulate a minimum weight of 800 (American Le Mans Series) and 825 kilogrammes (Le Mans Series and 24h Le Mans). The RS Spyder attains this weight without requiring any extensive use of exotic and thus highly expensive materials. Instead, the car features an intelligent, highly integrated lightweight design concept.