The Audi 50 (1974-1978) was the twin sister of the Volkswagen Polo Mk1 and was launched six months earlier. It was the first German supermini, designed to compete with the Renault 5 and Fiat 127. Although the Polo had a saloon bodystyle (the Derby), no such Audi equivalent was offered.
The car was better equipped and had a higher price than the VW Polo, and when the model was dropped from the range it wasn't replaced.