Launched in February 1989 as an early '90 model, the subcompact flagship of Chevrolet's Geo line came in 4-door notchback or 4-door hatchback form. Prizms are similar to the Toyota Corolla. Standard engine on base Prizms, and those with the LSi option group, was a 102-horsepower, 1.6-liter 4-cylinder. Autumn 1989 brought a sporty GSi model wearing a rear spoiler and body-colored grille and bumpers, halting via 4-wheel disc brakes and propelled by a more potent version of the base engine.