1985 Detroit Grand Prix
| Race details | |||
|---|---|---|---|
| Race 6 of 16 in the 1985 Formula One season | |||
 |
|||
| Date | June 23, 1985 | ||
| Official name | 4th Detroit Grand Prix | ||
| Location |
Detroit street circuit Detroit, Michigan |
||
| Course | Temporary street course | ||
| Course length | 4.120 km (2.56 mi) | ||
| Distance | 63 laps, 259.56 km (161.28 mi) | ||
| Weather | Clear, cool | ||
| Pole position | |||
| Driver | Lotus-Renault | ||
| Time | 1:42.051 | ||
| Fastest lap | |||
| Driver |
 Ayrton Senna
|
Lotus-Renault | |
| Time | 1:45.612 on lap 51 | ||
| Podium | |||
| First | Williams-Honda | ||
| Second | Ferrari | ||
| Third | 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.
The street circuit used for this Grand Prix laid out in the center of Detroit had been modified a little- the inside wall at the left-right sequence of corners on Beaubien Street between Congress Street and the notoriously bumpy Larned Street had been moved closer to the street itself, which made the right hander transitioning between Beaubien and Larned Streets slower than before. A bridge connecting 2 buildings flanking Larned Street had also been built; which actually hid the worst bumps on Larned from camera view- although these bumps were made obvious to viewers by the car's undertrays creating sparks thanks to the cars bouncing over these bumps rather violently.
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