Porsche flat-eight engines

The Porsche flat-eight engines are the several series of eight-cylinder boxer engines that Porsche built, mainly for racing cars. The first was the air-cooled Type 753 of 1960, designed by Hans Hönick and Hans Mezger for the 1.5 litre Formula One rules of 1961. A 2 litre sibling, the Type 771, powered the 718, 904, 906, 907, 910 and the 909 hill climber between 1962 and 1968, and a 2.2 litre 771/1 followed. The Type 908 was instead a six-cylinder racing engine with two cylinders added, used in the 908 prototypes and two 914/8 cars. The article also records a cancelled Type 1966 water-cooled prototype built for Volkswagen project EA266 and rumours of a turbocharged flat-eight for a mid-engined Porsche sports car.