Audi straight-five engine

The Audi straight-five engine is a family of five-cylinder petrol and diesel engines that Audi has built since 1976. It arrived in the Audi 100 in the late 1970s, as a petrol unit in 1977 and as a diesel in 1978, and a turbocharged version followed in 1983. The same engines were shared across the Volkswagen Group, so the Passat and other Volkswagen models used five-cylinder units, and Volvo fitted some of the diesels to its own cars in the late 1990s. The family also reached motorsport, where the Audi Quattro rally car was the first car to race with a straight-five. Audi still builds a turbocharged five-cylinder for the TT RS and RS3, which keeps the layout in production after almost half a century.