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A total of 59 examples of the Porsche 917 were built, 41 as short or long-tail coupes with naturally aspirated engines of up to 5.4-litres, and 18 as CanAm or InterSeries Spyder versions with 1,400bhp turbocharged engines. One model is slightly different; the 917/20, of which only a single example was ever built. A mixture of the long and short-tail coupes, the goal of the designers of the 917/20 was to combine the high speeds of the long-tail version with the easier handling of the short-tai

The Mulsanne straight at Le Mans, which is about six kilometres in length, has always played an important role for drivers and engineers in the history of the 24 Hours race. This is where high speed has top priority and decisive seconds can be gained. This is also why, as on no other race track in the world, aerodynamics determine how cars for Le Mans are designed. A long-tail Porsche only just missed its first Le Mans victory in 1969; it crossed the line about 100 metres behind the winner. T