The Porsche 918 Spyder is a mid-engined plug-in hybrid sports car designed by Porsche. The Spyder is powered by a naturally-aspirated 4.6 litre V8 engine, developing , with two electric motors delivering an additional for a combined output of . The 918 Spyder's 6.8 kWh lithium-ion battery pack delivers an all-electric range of under EPA's five-cycle tests. The car has a top speed of around .