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Unveiled at the 2011 North American Auto Show in Detroit and on show in the UK for the first time at Autosport International, the 918 RSR is a two-seat, mid-engined test-bed that combines the innovative flywheel and electric motor technology of the 911 GT3 R Hybrid race car and the design of the 918 Spyder concept to create a futuristic ‘super sports’ car concept.
The 918 RSR is based on the Porsche 918 Spyder concept that was first seen at the Geneva Show in 2010, and which has subsequently been confirmed for production in 2013. The 918 RSR artfully blends styling cues from iconic Porsche racing cars from the 1960s and 1970s with cutting-edge technology. The elegant flow of the car’s styling is dominated by muscular wheel arches, dynamic air intakes and a distinctive cockpit. A visible fan wheel above the rear engine compartment imparts further styling cues reminiscent of classic Porsche sports racing cars.
Motor racing technology also dominates the specification of the RSR under the skin; an especially light, torsionally-stiff carbon fibre-reinforced plastic (CFRP) monocoque. The V8 engine is a further development of the direct injection engine from the RS Spyder race car, tuned to deliver an output of 563 hp at 10,300 rpm. Two electric motors on the front wheels between them contribute 150 kW (204 hp) to the peak drive power of 767 hp. This additional power, which is generated during braking, is stored in an optimised flywheel accumulator, similar to that which has been successfully used in the Porsche Motorsport-developed 911 GT3 R Hybrid in 2010 and 2011.
