The 1985 Formula 1 season was the 39th season of FIA Formula 1 motor racing. It featured the 1985 Formula 1 World Championship for Drivers and the 1985 Formula 1 World Championship for Manufacturers, contested over a sixteen-race series. Alain Prost won his first Drivers' Championship, and McLaren-Honda won the Constructors' Championship.
The 1985 Formula 1 season began with the Brazilian Grand Prix at the Jacarepaguá circuit in Rio de Janeiro. Alain Prost won the race in his McLaren-TAG, finishing ahead of Michele Alboreto and Elio de Angelis.
Ayrton Senna claimed his first Formula 1 victory at the Portuguese Grand Prix at Estoril, driving for Lotus-Renault. He dominated in wet conditions, winning by over a minute from Michele Alboreto and Patrick Tambay.
Alain Prost won the prestigious Monaco Grand Prix, driving his McLaren-TAG to victory ahead of Michele Alboreto and Nelson Piquet. The race was red-flagged after 29 laps due to heavy rain and restarted.
Alain Prost won the British Grand Prix at Silverstone, extending his championship lead. He finished ahead of Keke Rosberg and Ayrton Senna. The race was notable for the debut of the carbon-fibre McLaren MP4/2B's continued dominance.
Niki Lauda won the Dutch Grand Prix at Zandvoort, claiming the 25th and final victory of his Formula 1 career. Driving for McLaren-TAG, he finished ahead of Alain Prost and Ayrton Senna.
![Circuit Park Zandvoort, 4,193 km, layout 1948-1972 [(https://web.archive.org/web/20100603204811/http://www.circuit-zandvoort.nl/info/track_data/]](https://upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Circuit_Park_Zandvoort-1980.svg/500px-Circuit_Park_Zandvoort-1980.svg.png)
Alain Prost won the Italian Grand Prix at Monza, further extending his championship lead over Michele Alboreto, who retired with engine trouble. Prost finished ahead of Nelson Piquet and Ayrton Senna.
Nigel Mansell claimed his first Formula 1 victory at the European Grand Prix at Brands Hatch, driving for Williams-Honda. He won ahead of Ayrton Senna and Alain Prost, who secured enough points to effectively seal the championship.
The inaugural Australian Grand Prix at the Adelaide Street Circuit served as the season finale. Keke Rosberg won the race for Williams-Honda. Alain Prost, who had already clinched the championship, finished fourth. This was the first F1 race held in Australia.
