Fahrzyklus
The energy storage system is a 312-cell, liquid-cooled 6.8 kWh lithium-ion battery positioned behind the passenger cell. In addition to a plug-in charge port at the passenger-side B pillar, the batteries are also charged by regenerative braking and by excess output from the engine when the car is coasting. emissions are 79 g/km and fuel consumption is under the New European Driving Cycle (NEDC). The U.S. Environmental Protection Agency (EPA) under its five-cycle tests rated the 2015 model year Porsche 918 Spyder energy consumption in all-electric mode at 50 kWh per 100 miles, which translates into a combined city/highway fuel economy of . When powered only by the gasoline engine, EPA's official combined city/highway fuel economy is .