In the Chassis materials include carbon fiber reinforced plastic and magnesium and aluminium for a lower weight. Batteries also recharge while braking, using KERS, and while coasting. The V8 engine is a version of the 3,4 liter one which is included in the RS Spyder racecars. The new two-seated 918 Spyder model consists of a hybrid plug-in system, with a V8 engine that operates with the aid of air cooled lithium ion batteries, generating over 500 hp, at a maximum of 9,200 rpm, and 2 electric motors, placed on the two axes, with a maximum power of 218 hp (160 kW). This trio of the new Cayenne S Hybrid, the 911 GT3 R Hybrid and the 918 Spyder Hybrid concept, demonstrates not just the qualities of this new technology, but also Porsche's innovative power, as a pioneering force in hybrid propulsion systems. Porsche 918 is one of the three hybrid propulsion models which have been revealed at the Geneva Motor Show. More than that, it scored a less than 7:30 minutes record on the Nurburgring track, outranking the Porsche Carrera GT - the pinnacle of the German company's series. Also, weighing only 3,285 (1,490 kg), the prototype offers supercar performances such as: accelerating from 0 to 100 km/h in just 3,2 seconds and a maximum speed of 62 mph (320 km/h). Its fuel consumption is about 78 mpg. The new Porsche 918 Spyder concept synthesizes racing abilities and electric mobility, offering an amazing suite of qualities: emission levels of about 70g CO2 per kilometer, when utilizing an average of 3 liters/100 kilometers.