• Porsche 918 RSR

The Porsche 918 Spyder mid-engined car is designed and built by Porsche, was presented to the public as a concept car at the Geneva Motor Show in March 2010 and in final form in 2013 in Atlanta, USA. It is the first hybrid vehicle designed by the German automaker.

The frame is a monocoque made of carbon fiber-reinforced plastic; Magnesium and aluminum are widely used for the construction of the machine whose declared weight is 1640kg.

The transmission is a dual-clutch transmission 7-speed. Two electric motors drive the front wheels directly through a fixed ratio, while a third electric motor is connected to the transmission and provides additional power to the rear wheels.

The car made a record on the Nürburgring time of 6:57 minutes, among the best in its class.

The 918 was built a racing version called the RSR. Built to be used in the 24 Hours of Nurburgring in 2011, the car featured a flywheel which rotated at 36,000 revolutions/m exploiting Braking energy, and then, on request, provided the Stored energy to the electric motors. The total output was 767hp, 563 generated by the V8 petrol engine and 204 from the front electrical units.