The 1985 Detroit Grand Prix was Round 6 of the 1985 FIA Formula 1 World Championship. The event was held on the streets of Detroit in Michigan, United States on Sunday, 23 June 1985. Ayrton Senna started on pole position in the Lotus Renault and Keke Rosberg was the race winner in the Williams Honda.
1985 Detroit Grand Prix IV Race Result
| Pos. | No. | Driver | Nationality | Team | Tyre | Laps | Time/Retired | Race Time | Gap | Interval | Best Lap | Lap | Speed | Started | Points |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 6 | Keke Rosberg | Finland | Williams Honda | Goodyear | 63 | 1:55:39.851 | 1:55:39.851 | - | - | 1:47.311 | 58 | 131.486 | 5 | 9 |
| 2 | 28 | Stefan Johansson | Sweden | Ferrari | Goodyear | 63 | +57.549 | 1:56:37.400 | +57.549 | +57.549 | 1:47.797 | 56 | 130.405 | 9 | 6 |
| 3 | 27 | Michele Alboreto | Italy | Ferrari | Goodyear | 63 | +1:03.170 | 1:56:43.021 | +1:03.170 | +5.621 | 1:47.518 | 43 | 130.300 | 3 | 4 |
| 4 | 4 | Stefan Bellof | Germany | Tyrrell Ford | Goodyear | 63 | +1:06.225 | 1:56:46.076 | +1:06.225 | +3.055 | 1:48.681 | 12 | 130.243 | 19 | 3 |
| 5 | 11 | Elio de Angelis | Italy | Lotus Renault | Goodyear | 63 | +1:26.966 | 1:57:06.817 | +1:26.966 | +20.741 | 1:47.572 | 43 | 129.859 | 8 | 2 |
| 6 | 7 | Nelson Piquet | Brazil | Brabham BMW | Pirelli | 62 | +1 lap | 1:57:02.787 | 1 lap | 1 lap | 1:48.045 | 40 | 127.871 | 10 | 1 |
| 7 | 18 | Thierry Boutsen | Belgium | Arrows BMW | Goodyear | 62 | +1 lap | 1:57:15.747 | 1 lap | +12.960 | 1:48.554 | 6 | 127.635 | 21 | |
| 8 | 8 | Marc Surer | Switzerland | Brabham BMW | Pirelli | 62 | +1 lap | 1:57:26.109 | 1 lap | +10.362 | 1:49.998 | 5 | 127.448 | 11 | |
| 9 | 23 | Eddie Cheever | United States | Alfa Romeo | Goodyear | 61 | +2 laps | 1:56:20.528 | 2 laps | 1 lap | 1:47.916 | 33 | 126.570 | 7 | |
| 10 | 25 | Andrea de Cesaris | Italy | Ligier Renault | Pirelli | 61 | +2 laps | 1:56:31.261 | 2 laps | +10.733 | 1:49.603 | 57 | 126.376 | 17 | |
| 11 | 17 | Gerhard Berger | Austria | Arrows BMW | Goodyear | 60 | +3 laps | 1:57:30.967 | 3 laps | 1 lap | 1:50.576 | 21 | 123.251 | 24 | |
| 12 | 26 | Jacques Laffite | France | Ligier Renault | Pirelli | 58 | +5 laps | 1:52:54.010 | 5 laps | 2 laps | 1:48.702 | 6 | 124.014 | 16 | |
| DNF | 12 | Ayrton Senna | Brazil | Lotus Renault | Goodyear | 51 | Accident | 1:33:51.473 | 1:45.612 | 51 | 131.171 | 1 | |||
| DNF | 3 | Martin Brundle | Great Britain | Tyrrell Ford | Goodyear | 30 | Accident | 55:34.355 | 1:49.073 | 15 | 130.316 | 18 | |||
| DNF | 10 | Philippe Alliot | France | RAM Hart | Pirelli | 27 | Accident | 55:23.380 | 1:53.752 | 6 | 117.672 | 23 | |||
| DNF | 5 | Nigel Mansell | Great Britain | Williams Honda | Goodyear | 26 | Accident | 48:43.906 | 1:48.241 | 6 | 128.795 | 2 | |||
| DNF | 2 | Alain Prost | France | McLaren TAG | Goodyear | 19 | Brakes | 35:22.986 | 1:49.001 | 8 | 129.627 | 4 | |||
| DNF | 22 | Riccardo Patrese | Italy | Alfa Romeo | Goodyear | 19 | Electrical | 46:26.194 | 1:50.729 | 6 | 98.771 | 14 | |||
| DNF | 16 | Derek Warwick | Great Britain | Renault | Goodyear | 18 | Transmission | 33:40.165 | 1:49.485 | 4 | 129.055 | 6 | |||
| DNF | 15 | Patrick Tambay | France | Renault | Goodyear | 15 | Accident | 28:18.134 | 1:49.931 | 6 | 127.941 | 15 | |||
| DNF | 29 | Pierluigi Martini | Italy | Minardi Motori Moderni | Pirelli | 11 | Engine | 37:05.662 | 1:55.446 | 7 | 71.585 | 25 | |||
| DNF | 1 | Niki Lauda | Austria | McLaren TAG | Goodyear | 10 | Brakes | 18:42.226 | 1:49.489 | 6 | 129.065 | 12 | |||
| DNF | 19 | Teo Fabi | Italy | Toleman Hart | Pirelli | 4 | Clutch | 7:42.926 | 1:51.211 | 3 | 125.152 | 13 | |||
| DNF | 9 | Manfred Winkelhock | Germany | RAM Hart | Pirelli | 3 | Turbo | 6:02.004 | 1:55.649 | 2 | 120.032 | 20 | |||
| DNF | 24 | Piercarlo Ghinzani | Italy | Osella Alfa Romeo | Pirelli | Accident | 22 |