Porsche 753 engine

The Porsche Type 753 engine is a naturally aspirated, air-cooled flat-eight racing engine that Porsche designed for the 1.5 litre Formula One rules that began in 1961. Hans Hönick and Hans Mezger designed it, work began in 1960, and it was used only in the 1962 Formula One season in the Type 804, which won the French Grand Prix at Rouen with Dan Gurney. Its bore and stroke of 66.0 by 54.6 mm gave 1,494 cc, with two overhead camshafts per bank driven by shafts, and power rose to 185 horsepower. It was costly to build, taking at least 100 hours to assemble. A 2 litre sibling, the Type 771, went into sports racers, and the 753 influenced the engine of the 901 project that became the 911.