Prost actually won the start from Piquet, but exiting the Epingle de l'ile hairpin halfway around the first lap his TAG turbo went flat under acceleration and the Brabham was past in a flash never to be headed again. The TAG turbo would have intermittent electrical issues for Prost which helped Lauda take 2nd from his team mate before the end.
The top six was completed by Elio de Angelis in the Lotus - Renault , René Arnoux in the Ferrari , and Nigel Mansell in the other Lotus-Renault.