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. It was powered by the Alfa Romeo 890T V8 turbo and ran on Michelin tyres. The 183T was driven in 1983 by Italian drivers Andrea de Cesaris and Mauro Baldi.

Basically the car was an updated version of the 182 with a V8 turbo engine fitted.

The 183T took 18 points from 29 entries; Andrea de Cesaris managed to score two second place finishes and also gained one fastest lap at Spa Francorchamps, a race that he started from the 2nd row and led over half the distance.

Unlike the preceding Alfa Romeo F1 cars, the 183T chassis was not designed by Alfa Romeo's Autodelta; instead Euroracing's chief engineer Gérard Ducarouge was the main designer. Euroracing had been earlier successful in Formula 3 with Alfa Romeo engines.

The 183T was retired after the season and replaced for 1984 by the Alfa Romeo 184T.