The car was updated for the 1983 Formula One season to become the FW08C. Under new regulations all ground effect was out and flat bottom cars were in, meaning nearly all the cars in Formula One had to be heavily modified or replaced and the FW08 was no different. Against the turbo cars of Renault, Brabham and Ferrari, Williams were not expected to do as well as they did. Jacques Laffite rejoined the team, having started his F1 career with Frank Williams Racing Cars back in 1974. Rosberg opened the season with pole position at the Brazilian Grand Prix (the last for a Ford-Cosworth DFV powered car) and scored the car's last win, at the 1983 Monaco Grand Prix. He would eventually finish fifth in the Drivers' Championship, while Williams finished 1983 in fourth place, the best of the Cosworth-powered cars.