410

Detroit Grand Prix IV

23 Jun 1985Detroit253.449 km (4023 m x 63 Laps)

 Pole Position: Ayrton Senna, Lotus 97T-Renault, 1:42.051 (141.931 km/h) Fastest Lap: Ayrton Senna, Lotus 97T-Renault, 1:45.612 (137.146 km/h lap 51) Race Results: Pos Car# Driver Car Time Speed 1 6 Keke Rosberg Williams FW10-Honda 1:55:39.851 131.488 km/h 2 28 Stefan Johansson Ferrari 156/85 1:56:37.400 130.407 km/h 3 27 Michele Alboreto Ferrari 156/85 1:56:43.021 130.302 km/h 4 4 Stefan Bellof Tyrrell 012-Ford 1:56:46.076 130.245 km/h 5 11 Elio de Angelis Lotus 97T-Renault 1:57:06.817 129.861 km/h 6 7 Nelson Piquet Brabham BT54-BMW -1 Lap 7 18 Thierry Boutsen Arrows A8-BMW -1 Lap 8 8 Marc Surer Brabham BT54-BMW -1 Lap 9 23 Eddie Cheever Alfa Romeo 185T -2 Laps 10 25 Andrea de Cesaris Ligier JS25-Renault -2 Laps 11 17 Gerhard Berger Arrows A8-BMW -3 Laps 12 26 Jacques Laffite Ligier JS25-Renault -5 Laps Did Not Finish: 12 Ayrton Senna Lotus 97T-Renault 51 Accident 3 Martin Brundle Tyrrell 012-Ford 30 Collision with Alliot 10 Philippe Alliot RAM 03-Hart 27 Collision with Brundle 5 Nigel Mansell Williams FW10-Honda 26 Accident 2 Alain Prost McLaren MP4/2B-TAG 19 Brakes 22 Riccardo Patrese Alfa Romeo 185T 19 Electrical 16 Derek Warwick Renault RE60 18 Transmission 15 Patrick Tambay Renault RE60 15 Accident 29 Pierluigi Martini Minardi M185-Motori Moderni 11 Engine 1 Niki Lauda McLaren MP4/2B-TAG 10 Brakes 19 Teo Fabi Toleman TG185-Hart 4 Clutch 9 Manfred Winkelhock RAM 03-Hart 3 Turbo 24 Piercarlo Ghinzani Osella FA1G-Alfa Romeo 0 Accident Lap Leaders: Car# Driver Car Laps Total 12 Ayrton Senna Lotus 97T-Renault 1-7 7 6 Keke Rosberg Williams FW10-Honda 8-63 56 Fastest Laps: Pos Car# Driver Car Time Speed Lap 1 12 Ayrton Senna Lotus 97T-Renault 1:45.612 137.146 51 2 6 Keke Rosberg Williams FW10-Honda 1:47.311 134.974 58 3 27 Michele Alboreto Ferrari 156/85 1:47.518 134.715 43 4 11 Elio de Angelis Lotus 97T-Renault 1:47.572 134.647 43 5 28 Stefan Johansson Ferrari 156/85 1:47.797 134.366 56 6 23 Eddie Cheever Alfa Romeo 185T 1:47.916 134.217 33 7 7 Nelson Piquet Brabham BT54-BMW 1:48.045 134.057 40 8 5 Nigel Mansell Williams FW10-Honda 1:48.241 133.815 6 9 18 Thierry Boutsen Arrows A8-BMW 1:48.554 133.429 6 10 4 Stefan Bellof Tyrrell 012-Ford 1:48.681 133.273 12 11 26 Jacques Laffite Ligier JS25-Renault 1:48.702 133.247 6 12 2 Alain Prost McLaren MP4/2B-TAG 1:49.001 132.882 8 13 3 Martin Brundle Tyrrell 012-Ford 1:49.073 132.794 15 14 16 Derek Warwick Renault RE60 1:49.485 132.294 4 15 1 Niki Lauda McLaren MP4/2B-TAG 1:49.489 132.289 6 16 25 Andrea de Cesaris Ligier JS25-Renault 1:49.603 132.152 57 17 15 Patrick Tambay Renault RE60 1:49.931 131.758 6 18 8 Marc Surer Brabham BT54-BMW 1:49.998 131.677 5 19 17 Gerhard Berger Arrows A8-BMW 1:50.576 130.989 21 20 22 Riccardo Patrese Alfa Romeo 185T 1:50.729 130.808 6 21 19 Teo Fabi Toleman TG185-Hart 1:51.211 130.241 3 22 10 Philippe Alliot RAM 03-Hart 1:53.752 127.332 6 23 29 Pierluigi Martini Minardi M185-Motori Moderni 1:55.446 125.463 7 24 9 Manfred Winkelhock RAM 03-Hart 1:55.649 125.243 2 Qualifying Times: Pos Car# Driver Car Time Speed Entrant 1 12 Ayrton Senna Lotus 97T-Renault 1:42.051 141.931 John Player Special Team Lotus 2 5 Nigel Mansell Williams FW10-Honda 1:43.249 140.285 Canon Williams Honda Team 3 27 Michele Alboreto Ferrari 156/85 1:43.748 139.610 Scuderia Ferrari SpA 4 2 Alain Prost McLaren MP4/2B-TAG 1:44.088 139.154 Marlboro McLaren International 5 6 Keke Rosberg Williams FW10-Honda 1:44.156 139.063 Canon Williams Honda Team 6 16 Derek Warwick Renault RE60 1:44.163 139.054 Equipe Renault Elf 7 23 Eddie Cheever Alfa Romeo 185T 1:44.231 138.963 Benetton Team Alfa Romeo 8 11 Elio de Angelis Lotus 97T-Renault 1:44.769 138.249 John Player Special Team Lotus 9 28 Stefan Johansson Ferrari 156/85 1:44.921 138.049 Scuderia Ferrari SpA 10 7 Nelson Piquet Brabham BT54-BMW 1:45.194 137.691 Motor Racing Developments Ltd 11 8 Marc Surer Brabham BT54-BMW 1:45.979 136.671 Motor Racing Developments Ltd 12 1 Niki Lauda McLaren MP4/2B-TAG 1:46.266 136.302 Marlboro McLaren International 13 19 Teo Fabi Toleman TG185-Hart 1:46.546 135.944 Toleman Group Motorsport 14 22 Riccardo Patrese Alfa Romeo 185T 1:46.592 135.885 Benetton Team Alfa Romeo 15 15 Patrick Tambay Renault RE60 1:47.028 135.331 Equipe Renault Elf 16 26 Jacques Laffite Ligier JS25-Renault 1:47.267 135.030 Equipe Ligier Gitanes 17 25 Andrea de Cesaris Ligier JS25-Renault 1:47.393 134.871 Equipe Ligier Gitanes 18 3 Martin Brundle Tyrrell 012-Ford 1:47.563 134.658 Tyrrell Racing Organisation 19 4 Stefan Bellof Tyrrell 012-Ford 1:47.911 134.224 Tyrrell Racing Organisation 20 9 Manfred Winkelhock RAM 03-Hart 1:47.926 134.205 Skoal Bandit Formula 1 Team 21 18 Thierry Boutsen Arrows A8-BMW 1:48.023 134.085 Barclay Arrows BMW 22 24 Piercarlo Ghinzani Osella FA1G-Alfa Romeo 1:48.546 133.439 Osella Squadra Corse 23 10 Philippe Alliot RAM 03-Hart 1:50.455 131.132 Skoal Bandit Formula 1 Team 24 17 Gerhard Berger Arrows A8-BMW 2:05.307 115.590 Barclay Arrows BMW 25 29 Pierluigi Martini Minardi M185-Motori Moderni 3:04.446 78.528 Minardi Team SpA 1st Friday Practice: Pos Car# Driver Car Time Speed 1 12 Ayrton Senna Lotus 97T-Renault 1:44.383 138.761 2 6 Keke Rosberg Williams FW10-Honda 1:44.899 138.078 3 27 Michele Alboreto Ferrari 156/85 1:45.508 137.281 4 11 Elio de Angelis Lotus 97T-Renault 1:45.563 137.209 5 18 Thierry Boutsen Arrows A8-BMW 1:46.565 135.919 6 23 Eddie Cheever Alfa Romeo 185T 1:46.678 135.775 7 16 Derek Warwick Renault RE60 1:46.789 135.634 8 7 Nelson Piquet Brabham BT54-BMW 1:46.917 135.472 9 28 Stefan Johansson Ferrari 156/85 1:47.043 135.312 10 22 Riccardo Patrese Alfa Romeo 185T 1:47.078 135.268 11 2 Alain Prost McLaren MP4/2B-TAG 1:47.521 134.711 12 5 Nigel Mansell Williams FW10-Honda 1:47.549 134.676 13 15 Patrick Tambay Renault RE60 1:47.583 134.633 14 17 Gerhard Berger Arrows A8-BMW 1:48.154 133.922 15 3 Martin Brundle Tyrrell 012-Ford 1:48.391 133.630 16 8 Marc Surer Brabham BT54-BMW 1:49.005 132.877 17 9 Manfred Winkelhock RAM 03-Hart 1:49.256 132.572 18 4 Stefan Bellof Tyrrell 012-Ford 1:49.651 132.094 19 19 Teo Fabi Toleman TG185-Hart 1:50.500 131.079 20 24 Piercarlo Ghinzani Osella FA1G-Alfa Romeo 1:50.530 131.044 21 25 Andrea de Cesaris Ligier JS25-Renault 1:50.987 130.504 22 26 Jacques Laffite Ligier JS25-Renault 1:51.119 130.349 23 10 Philippe Alliot RAM 03-Hart 1:53.717 127.371 24 1 Niki Lauda McLaren MP4/2B-TAG 1:53.933 127.129 25 29 Pierluigi Martini Minardi M185-Motori Moderni 2:06.944 114.099 2nd Friday Practice: Pos Car# Driver Car Time Speed 1 12 Ayrton Senna Lotus 97T-Renault 1:42.051 141.931 2 5 Nigel Mansell Williams FW10-Honda 1:43.249 140.285 3 27 Michele Alboreto Ferrari 156/85 1:43.748 139.610 4 2 Alain Prost McLaren MP4/2B-TAG 1:44.088 139.154 5 6 Keke Rosberg Williams FW10-Honda 1:44.156 139.063 6 16 Derek Warwick Renault RE60 1:44.163 139.054 7 23 Eddie Cheever Alfa Romeo 185T 1:44.231 138.963 8 11 Elio de Angelis Lotus 97T-Renault 1:44.769 138.249 9 28 Stefan Johansson Ferrari 156/85 1:44.921 138.049 10 7 Nelson Piquet Brabham BT54-BMW 1:45.194 137.691 11 8 Marc Surer Brabham BT54-BMW 1:45.979 136.671 12 1 Niki Lauda McLaren MP4/2B-TAG 1:46.266 136.302 13 19 Teo Fabi Toleman TG185-Hart 1:46.546 135.944 14 22 Riccardo Patrese Alfa Romeo 185T 1:46.592 135.885 15 15 Patrick Tambay Renault RE60 1:47.028 135.331 16 26 Jacques Laffite Ligier JS25-Renault 1:47.267 135.030 17 25 Andrea de Cesaris Ligier JS25-Renault 1:47.393 134.871 18 3 Martin Brundle Tyrrell 012-Ford 1:47.563 134.658 19 4 Stefan Bellof Tyrrell 012-Ford 1:47.911 134.224 20 9 Manfred Winkelhock RAM 03-Hart 1:47.926 134.205 21 18 Thierry Boutsen Arrows A8-BMW 1:48.023 134.085 22 24 Piercarlo Ghinzani Osella FA1G-Alfa Romeo 1:48.546 133.439 23 10 Philippe Alliot RAM 03-Hart 1:50.455 131.132 24 29 Pierluigi Martini Minardi M185-Motori Moderni 3:04.446 78.528 2nd Saturday Practice: Pos Car# Driver Car Time Speed 1 17 Gerhard Berger Arrows A8-BMW 2:05.307 115.590 2 23 Eddie Cheever Alfa Romeo 185T 2:05.540 115.374 3 24 Piercarlo Ghinzani Osella FA1G-Alfa Romeo 2:11.904 109.808 4 25 Andrea de Cesaris Ligier JS25-Renault 2:12.268 109.506 5 10 Philippe Alliot RAM 03-Hart 2:24.814 100.019 Warm Up: Pos Car# Driver Car Time Speed 1 12 Ayrton Senna Lotus 97T-Renault 1:44.877 138.107 2 5 Nigel Mansell Williams FW10-Honda 1:45.213 137.666 3 11 Elio de Angelis Lotus 97T-Renault 1:46.009 136.632 4 2 Alain Prost McLaren MP4/2B-TAG 1:46.148 136.453 5 16 Derek Warwick Renault RE60 1:46.411 136.116 6 28 Stefan Johansson Ferrari 156/85 1:46.453 136.062 7 27 Michele Alboreto Ferrari 156/85 1:47.178 135.142 8 8 Marc Surer Brabham BT54-BMW 1:47.230 135.076 9 23 Eddie Cheever Alfa Romeo 185T 1:47.521 134.711 10 18 Thierry Boutsen Arrows A8-BMW 1:47.589 134.626 11 26 Jacques Laffite Ligier JS25-Renault 1:47.675 134.518 12 3 Martin Brundle Tyrrell 012-Ford 1:47.894 134.245 13 6 Keke Rosberg Williams FW10-Honda 1:48.030 134.076 14 22 Riccardo Patrese Alfa Romeo 185T 1:48.076 134.019 15 4 Stefan Bellof Tyrrell 012-Ford 1:48.177 133.894 16 15 Patrick Tambay Renault RE60 1:48.493 133.504 17 1 Niki Lauda McLaren MP4/2B-TAG 1:48.702 133.247 18 25 Andrea de Cesaris Ligier JS25-Renault 1:48.908 132.995 19 7 Nelson Piquet Brabham BT54-BMW 1:49.790 131.927 20 17 Gerhard Berger Arrows A8-BMW 1:49.803 131.911 21 19 Teo Fabi Toleman TG185-Hart 1:50.870 130.642 22 24 Piercarlo Ghinzani Osella FA1G-Alfa Romeo 1:52.944 128.243 23 29 Pierluigi Martini Minardi M185-Motori Moderni 1:58.202 122.538 24 9 Manfred Winkelhock RAM 03-Hart 2:02.948 117.808 25 10 Philippe Alliot RAM 03-Hart 2:07.016 114.035 Notes:
  • 1st friday and 1st saturday practice sessions were not officially recorded.
  • 1st saturday practice times not available.
  • Weather: Sunny, Hot, Dry.
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    Race Review:

    There was only a week between the Canadian and Detroit races but there was a big announcement with Ford agreeing to supply its turbocharged engine to Carl Haas's Beatrice team. The canceled Belgian GP was also rescheduled for September.

    The entry was the same as in Montréal with Ayrton Senna on pole in his Lotus-Renault ahead of Nigel Mansell's Williams-Honda and Michele Alboreto's Ferrari. Alain Prost was fourth in his McLaren-TAG ahead of Keke Rosberg (Williams-Honda), Derek Warwick (Renault), Eddie Cheever (Alfa Romeo), Elio de Angelis (Lotus-Renault), Stefan Johansson (Ferrari) and Nelson Piquet (Brabham-BMW).

    Senna took the lead at the start while Rosberg drove a stunning opening lap to pass Mansell, Prost and the slow-starting Alboreto. Senna soon began to struggle because of tyre problems and on the eighth lap Rosberg took the lead. Senna went into the pits and dropped right back down the order, leaving the two Williams-Hondas to run 1-2. Alboreto was third having overtaken Prost but he soon fell behind de Angelis and when Mansell spun on lap 20 the Lotus moved to second, while Mansell rejoined under pressure from Johansson and soon fell behind the Swede as well. Prost disappeared at the same time with a spin and Mansell followed while Martin Brundle (Tyrrell) found his car to be very competitive and having overtaken Alboreto, profited from Mansell's disappearance to run fourth. De Angelis was then forced into the pits when he snagged a front wing while going through backmarkers. He was no longer a force. Alboreto in the meantime has repassed Brundle and on lap 30 he collided with backmarker Philippe Alliot's RAM. This meant that Stefan Bellof (Tyrrell) was up to fourth. And so it remained until lap 50 when Rosberg pitted to get some paper out of his radiators. He rejoined with new tyres just ahead of Johansson and soon motored away again. Senna was making good progress now and challenging Alboreto for third but on lap 52 Senna made a mistake while trying to get ahead and crashed. Thus Rosberg came home the winner ahead of Johansson, Alboreto, Bellof and de Angelis with sixth place going to Piquet.