BMW i8 engine is a unique combination of performance and efficiency, demonstrating the company's dedication to long-term innovation. Unlike previous supercars, the i8 has a plug-in hybrid powertrain that combines a turbocharged 1.5-liter three-cylinder petrol engine with an electric motor to produce a total of 369 horsepower. This clever combination enables the i8 to deliver exhilarating acceleration while emitting minimally.