The Alfa Romeo 158/159, also known as the Alfetta (Little Alfa in Italian[1]), is a Grand Prix racing car produced by Italian manufacturer Alfa Romeo. It is one of the most successful racing cars ever produced- the 158 and its derivative, the 159, took 47 wins from 54 Grands Prix entered.[2]

It was originally developed for the pre-World War II voiturette formula (1937) and has a 1.5-litre straight-8 supercharged engine. Following World War II, the car was eligible for the new Formula One introduced in 1947. In the hands of drivers such as Nino FarinaJuan-Manuel Fangio and Luigi Fagioli, it dominated the first two seasons of the World Championship of Drivers.