Porsche 918 RSR (cont'd)

Motor racing technology also dominates within the particularly light, torsionally stiff carbon fibre-reinforced plastic (CFRP) monocoque. The V8 engine is a further development of the direct injection engine from the successful RS Spyder race car and now offers an output of precisely 563 hp at 10,300/rpm in the 918 RSR. The electric motors on the two front wheels each contribute 75 kW, i.e. a total of 150 kW, to the peak drive power of exactly 767 hp. This additional power, which is generated during braking, is stored in an optimised flywheel accumulator.

In the 918 RSR, the two electric motors offer a torque vectoring function with variable torque distribution to the front axle. This additionally increases agility and improves steering response. Mounted upstream of the rear axle, the mid-engine is integrated with a racing transmission also based on the RS Spyder race car. This further developed six-speed constant-mesh transmission with longitudinally mounted shafts and straight-toothed spur gears is operated using two shift paddles behind the racing steering wheel.

General specifications
Country of origin Germany
Numbers built N/A
Introduced 2011
Introduced at 2011 NAIAS

Configuration Hybrid drive with two 75 kW electric motors and 90º V 8
Location Mid, longitudinally mounted
Construction aluminium block and head
Displacement 3.4 liter / 207.5 cu in
Valvetrain 4 valves / cylinder, DOHC
Fuel feed Direct Fuel Injection
Aspiration Naturally Aspirated

Chassis/body carbon fibre monocoque
Gearbox 6 speed Sequential
Drive Rear wheel drive

Performance figures
Power 767 bhp / 572 KW @ 10300 rpm
BHP/Liter 226 bhp / liter

 source: www.ultimatecarpage.com