1985 Detroit Grand Prix

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United States  1985 Detroit Grand Prix
Race details
Race 6 of 16 in the 1985 Formula One season
Circuit Detroit.png
Date June 23, 1985
Official name 4th Detroit Grand Prix
Location Detroit street circuit
Detroit, Michigan
Course Temporary street course
4.120 km (2.56 mi)
Distance 63 laps, 259.56 km (161.28 mi)
Weather Clear, cool
Pole position
Driver Brazil Ayrton Senna Lotus-Renault
Time 1:42.051
Fastest lap
Driver Brazil Ayrton Senna Lotus-Renault
Time 1:45.612 on lap 51
Podium
First Finland Keke Rosberg Williams-Honda
Second Sweden Stefan Johansson Ferrari
Third Italy Michele Alboreto Ferrari

The 1985 Detroit Grand Prix was a Formula One motor race held on June 23, 1985 in Detroit, Michigan. It was the sixth round of the 1985 FIA Formula One World Championship and the fourth Detroit Grand Prix. The race was held over 63 laps of the seven kilometre circuit for a total race distance of 260 kilometres.

For the first time in ten years, the United States hosted only one Grand Prix. Finland's Keke Rosberg (Williams FW10) took the lead from pole-sitter Ayrton Senna (Lotus 97T) on lap eight, avoided the tire and brake problems that plagued the other front-runners and held off the Ferrari 156/85s of Stefan Johansson and Michele Alboreto to win. Stefan Bellof earned a scintillating fourth place in his Tyrrell 012, scoring the last points for the legendary Cosworth-Ford V8 engine until 1988. It was the fourth Formula One Grand Prix victory for the 1982 World Champion. Alboreto's third place allowed him to expand his points lead over Lotus driver Elio de Angelis to seven points. Eventual 1985 World Champion Alain Prost was now nine points behind Alboreto and as far from the championship as he would get all year.


Summary[edit]

In Friday qualifying, Senna's nimble Lotus, well suited to the track, was easily quickest in both sessions, averaging 88.183 mph (141.917 km/h), nearly 1.2 seconds clear of Nigel Mansell's Williams. Still, changes to the course meant that Senna's time was over a second slower than Nelson Piquet's pole-winning time from the previous year. The Ferraris of Alboreto and Johansson were in third and ninth place, as Alboreto said, "Our suspension does not absorb the bumps nearly as well as the Lotus. I have trouble getting the power down, which is necessary between the slow corners." Rain on Saturday meant that the Friday times would determine the grid, and the teams would be without a much-needed second day of practice although Gerhard Berger had to set his qualifying time on the Saturday as he didn't set a time on Friday after crashing twice before he could set a time.

The Williams teammates used different tyre compounds in qualifying and were over a second apart on the grid. Rosberg, on qualifiers, was fifth, while Mansell chose the softer race compound and placed second. This revelation led Rosberg to gamble on using the soft race rubber for the race, while everyone else had the harder compound. Aided by a cool breeze on Sunday, this decision played an important role in the race's outcome.

Sunday was clear and breezy with a large and enthusiastic crowd. Unlike the 1984 race, the drivers made a clean start, as Mansell got away well on the outside and took the first corner ahead of Senna. In Turn 2, however, Senna took the lead back, and by the end of the first lap, Rosberg had also gotten around Mansell. After one lap, Senna and Rosberg were opening a gap to Mansell, Prost, Alboreto, Derek Warwick, Elio de Angelis, Johansson, Piquet and Lauda. The Tyrrells of Bellof and Martin Brundle, down on power to the turbos but always extremely well suited to the tight Detroit circuit, each moved up six places on the first lap to 12th and 13th.

By lap seven, Senna and Rosberg led Mansell by seven seconds. On lap eight, Senna surrendered the lead when he pitted for tires. Warwick had dropped back steadily, eventually retiring with a broken driveshaft, while the McLarens of Prost and Lauda quickly experienced brake problems. Lauda made it back to the pits to retire with no brakes on lap 10, but when Prost had the same problem on lap 20, he was unable to slow for Turn 2 and slid into the tyre wall.

de Angelis, on the other hand, was making steady progress. He took fourth when Senna pitted, then passed Alboreto for third and began closing the gap to Mansell, who also was struggling with overheating brakes. On lap 20, with Rosberg's lead at 24 seconds, de Angelis got around Mansell to take second place. Mansell pitted on lap 24 after losing another position to Johansson. He returned in ninth place only to retire immediately when he hit the wall hard in Turn 2.

As he was about to be lapped, Gerhard Berger damaged the nose of de Angelis' Lotus when he closed the door on the Italian. When de Angelis pitted for tires and a new nose, the Tyrrells were nose to tail in fourth and fifth, hounding the Ferrari of Alboreto. Approaching Turn 16 on lap 31, Philippe Alliot moved over to let Alboreto through but didn't see Brundle right behind. When Alliot moved back to the racing line, Brundle had nowhere to go and hit the wall in a shower of sparks.

At the halfway point, Rosberg led Johansson by 33 seconds. Alboreto was another 10 seconds back, followed by Bellof, Senna and de Angelis. Several successive fastest laps by Senna allowed him to overtake Bellof and then quickly close the gap to Alboreto.

Entering Turn 2, where the surface was beginning to break up and where both Prost and Mansell had crashed, Alboreto stayed right, away from the racing line and the bad patch at the apex. Senna charged through on the left, got on the marbles, and hit the wall exactly as the others had done, while Alboreto continued, minus the threat to his third place. Meanwhile, Rosberg, secure in the lead, had noticed his water temperature climbing. When a member of the crew noticed something caught in his radiator, he pitted to have it removed. The crew also gave him new tyres, which he didn't want because Johansson was not far behind. Rosberg blasted out of the pits and just managed to beat the Ferrari to the first corner. Spurred on by the chance for his first win, Johansson hounded the Williams until, with just three laps to go, a brake disc broke up and he began to crawl around the circuit, hoping to make the finish.

Alboreto, in third, had also been trying to save his brakes, but he now had to contend with a charging Bellof. With two laps to go, the West German had the Tyrrell right on Alboreto's tail, waiting for a mistake. Just as he was about to go by, however, Bellof's clutch began slipping, and he had to be content to follow the Ferrari home. de Angelis, the last driver on the lead lap took fifth place, and Piquet brought the Brabham home in sixth.

Classification[edit]

Qualifying[edit]

Pos No Driver Constructor Q1 Q2 Gap
1 12 Brazil Ayrton Senna Lotus-Renault 1:42.051
2 5 United Kingdom Nigel Mansell Williams-Honda 1:43.249 +1.198
3 27 Italy Michele Alboreto Ferrari 1:43.748 +1.697
4 2 France Alain Prost McLaren-TAG 1:44.088 +2.037
5 6 Finland Keke Rosberg Williams-Honda 1:44.156 +2.105
6 16 United Kingdom Derek Warwick Renault 1:44.163 +2.112
7 23 United States Eddie Cheever Alfa Romeo 1:44.231 2:05.540 +2.180
8 11 Italy Elio de Angelis Lotus-Renault 1:44.769 +2.718
9 28 Sweden Stefan Johansson Ferrari 1:44.921 +2.870
10 7 Brazil Nelson Piquet Brabham-BMW 1:45.194 +3.143
11 8 Switzerland Marc Surer Brabham-BMW 1:45.979 +3.928
12 1 Austria Niki Lauda McLaren-TAG 1:46.266 +4.215
13 19 Italy Teo Fabi Toleman-Hart 1:46.546 +4.495
14 22 Italy Riccardo Patrese Alfa Romeo 1:46.592 +4.541
15 15 France Patrick Tambay Renault 1:47.028 +4.977
16 26 France Jacques Laffite Ligier-Renault 1:47.267 +5.216
17 25 Italy Andrea de Cesaris Ligier-Renault 1:47.393 2:l2.268 +5.342
18 3 United Kingdom Martin Brundle Tyrrell-Ford 1:47.563 +5.512
19 4 West Germany Stefan Bellof Tyrrell-Ford 1:47.911 +5.860
20 9 West Germany Manfred Winkelhock RAM-Hart 1:47.926 +5.875
21 18 Belgium Thierry Boutsen Arrows-BMW 1:48.023 +5.978
22 24 Italy Piercarlo Ghinzani Osella-Alfa Romeo 1:48.546 2:11.268 +6.495
23 10 France Philippe Alliot RAM-Hart 1:50.455 2:24.814 +8.404
24 17 Austria Gerhard Berger Arrows-BMW 2:05.387 +23.336
25 29 Italy Pierluigi Martini Minardi-Motori Moderni 3:04.446 +1:22.395

Race[edit]

Pos No Driver Constructor Laps Time/Retired Grid Points
1 6 Finland Keke Rosberg Williams-Honda 63 1:55:39.851 5 9
2 28 Sweden Stefan Johansson Ferrari 63 + 57.549 9 6
3 27 Italy Michele Alboreto Ferrari 63 + 1:03.170 3 4
4 4 West Germany Stefan Bellof Tyrrell-Ford 63 + 1:06.225 19 3
5 11 Italy Elio de Angelis Lotus-Renault 63 + 1:26.966 8 2
6 7 Brazil Nelson Piquet Brabham-BMW 62 + 1 Lap 10 1
7 18 Belgium Thierry Boutsen Arrows-BMW 62 + 1 Lap 21  
8 8 Switzerland Marc Surer Brabham-BMW 62 + 1 Lap 11  
9 23 United States Eddie Cheever Alfa Romeo 61 + 2 Laps 7  
10 25 Italy Andrea de Cesaris Ligier-Renault 61 + 2 Laps 17  
11 17 Austria Gerhard Berger Arrows-BMW 60 + 3 Laps 24  
12 26 France Jacques Laffite Ligier-Renault 58 + 5 Laps 16  
Ret 12 Brazil Ayrton Senna Lotus-Renault 51 Accident 1  
Ret 3 United Kingdom Martin Brundle Tyrrell-Ford 30 Collision 18  
Ret 10 France Philippe Alliot RAM-Hart 27 Collision 23  
Ret 5 United Kingdom Nigel Mansell Williams-Honda 26 Accident 2  
Ret 2 France Alain Prost McLaren-TAG 19 Brakes 4  
Ret 22 Italy Riccardo Patrese Alfa Romeo 19 Electrical 14  
Ret 16 United Kingdom Derek Warwick Renault 18 Transmission 6  
Ret 15 France Patrick Tambay Renault 15 Accident 15  
Ret 29 Italy Pierluigi Martini Minardi-Motori Moderni 11 Engine 25  
Ret 1 Austria Niki Lauda McLaren-TAG 10 Brakes 12  
Ret 19 Italy Teo Fabi Toleman-Hart 4 Clutch 13  
Ret 9 West Germany Manfred Winkelhock RAM-Hart 3 Turbo 20  
Ret 24 Italy Piercarlo Ghinzani Osella-Alfa Romeo 0 Accident 22  

Standings after the race[edit]

  • Note: Only the top five positions are included for both sets of standings.

References[edit]

  • Innes Ireland (October, 1985). "4th Detroit Grand Prix: Look Out, Williams Is Back". Road & Track, 158-162.


Previous race:
1985 Canadian Grand Prix
FIA Formula One World Championship
1985 season
Next race:
1985 French Grand Prix
Previous race:
1984 Detroit Grand Prix
Detroit Grand Prix Next race:
1986 Detroit Grand Prix