The Porsche 918 Spyder is a mid-engined sports plug-in hybrid designed by Porsche and first shown as a concept at the 80th edition of the Geneva Motor Show in March 2010. The Spyder is powered by a 4.6 litre V8 engine, developing 608 horsepower (453 kW), with two electric motors delivering an additional 279 horsepower (208 kW). It is the first plug-in hybrid car from Porsche. Porsche intends to manufacture 918 units as a 2014 model year starting production on September 18, 2013, with deliveries scheduled to begin in December 2013.