The Alfa Romeo Alfasud (Type 901, 902 and 904) is a small family car manufactured and marketed from 1971 to 1989 by Alfa Romeo as a front-engine, four-door, five passenger entry-level model over a single generation — with facelifts in 1977 and 1980. Alfa Romeo subsequently introduced a two-door wagon variant, the Giardinetta (1975); two-door coupe, the Alfasud Sprint (1976); three-door hatchback (1981) and five-door hatchback (1982).

Assembly was primarily at the Alfa Romeo Pomigliano d'Arco plant, and 893,719 were manufactured from 1972 to 1983, with the addition of 121,434 Sprint coupé versions between 1976 and 1989.

Developed by Austrian engineer, Rudolf Hruska, the Alfasud was noted for its boxer engine configuration, low center of gravity, aerodynamic profile, class-leading handling, styling by Giorgetto Giugiaro of ItalDesign, and a conspicuous susceptibility to rust.