The Alfa Romeo 183T was a Formula One car designed by Gérard Ducarouge and Mario Tollentino and was used by Marlboro Team Alfa Romeo during the 1983 Formula One season. The car, with a newly designed flat bottom, made its debut at the 1983 Brazilian Grand Prix. Running on French Michelins, the 183T was driven in 1983 by Italians Andrea de Cesaris and Mauro Baldi.