These are the best 10 Porsche models on sale today ... of a turbocharger came about in 1972, when Porsche fitted their 917 Can-Am-series race car with twin turbochargers in order to better ...

Today the only reason people remember the Sebring 12 Hours from 1970 is not for the Ferrari that won it, but the Porsche ... 10 per cent improvement in horsepower per litre relative to the Can-Am ...