Qualifying

Ayrton Senna repeated his 1986 win in Detroit and won his second 1987 race in a row and the second win for a car with active suspension. The win in Monaco three weeks before had proven that Lotus's new system worked, and on the bumpy Detroit circuit, it was even more of an advantage. Superior tyre wear allowed Senna to run the entire race without stopping, and he came home over half a minute ahead of the Williams-Honda of eventual Driver's Champion Nelson Piquet.

Normally, the Detroit race was immediately preceded or followed by the Canadian Grand Prix. In 1987, however, FISA had demanded improvements to the circuit in Montreal, including new pits. When it was determined that these changes could not be completed in time, along with sponsorship problems, the race was cancelled and there would be no Canadian race for only the second time since 1967.

On Friday, Nigel Mansell's Williams was fastest in both qualifying sessions, ahead of Senna's Lotus and Piquet, in the second Williams. It rained on Friday night, but the track was dry for the afternoon session on Saturday. In the final session, Senna briefly took the top spot, but Mansell took it back and ended up more than a second quicker for his fourth pole in five races on the season. American Eddie Cheever was sixth for Arrows, just behind Alain Prost's McLaren MP4/3.

Race

It rained again on Saturday night and Sunday morning, but, after a soaked warm-up on race morning, the start was dry. The first three got away from the grid in order, while Cheever jumped up to fourth and Teo Fabi went from eighth to fifth in the Benetton B187, followed by Michele Alboreto (Ferrari F1/87), Prost, Thierry Boutsen (Benetton B187) and Stefan Johansson (McLaren MP4/3). On lap three, Piquet went wide in a corner and picked up debris that led to a slow puncture. Cheever and Fabi got by Piquet before he was forced to pit. Three laps later, after repeated attempts to get around Cheever, Fabi put his front wing into Cheever's rear tire, puncturing it and breaking the nose of his Benetton B187. Fabi came around to the pits, driving without a nosecone, but retired the vehicle there. Speaking with CBS' Dave Despain directly after, Fabi confirmed the only problem was a missing wing. Cheever made it to the pits around the same time, losing a lap and rejoining in 19th position.

By lap ten, Mansell was five seconds ahead of Senna, with Alboreto another 23 seconds back in third. Suddenly, Senna felt his brake pedal go soft entering a turn and he narrowly avoided hitting the wall. He decided to back off and allow the brakes to cool, dropping three seconds per lap from his times. Primarily concerned about staying ahead of Alboreto, Senna got a break when the Ferrari F1/87's gearbox failed on lap 25, handing third place to Prost. On the next lap, Senna began to go after Mansell.

On lap 26, Mansell's lead was 18.8 seconds over Senna, but he was beginning to experience cramps in his right leg. A stop for tyres on lap 34 took 18 seconds when the right rear wheel nut refused to seat properly. Holding the brakes on much longer than normal made the Englishman's cramp even worse. Prost, now in second, was struggling with brake and gearbox problems as he stopped for tyres.

Senna set the race's fastest lap on lap 39 at 1:40.464, faster than his qualifying time. Realizing that he was faster on his original tyres than the others were on new ones, he decided to finish the race without stopping to change tyres. The Lotus crew emerged in the pit lane for a time as if preparing for a stop, but it became clear that the Brazilian was not in fact coming in. By that time, he was nearly a minute ahead.

Mansell, by this time, was exhausted, his head rolling from side to side in the cockpit. He said after the race that every time he passed the pits, he thought of stopping. On lap 53, Piquet and Prost passed him, and on lap 56, Gerhard Berger did as well. His perseverance gained him two points for fifth, a lap down, while Cheever took the final point.

Senna eased up toward the end, and with three laps to go the skies were threatening rain. It never became an issue, however, as the rain started to fall after the finish, with Senna crossing the line thirty-three seconds ahead. It was the sixth win of his career, but his last in 1987 and the last for the Lotus team, which eventually folded in 1994. Senna said that his tyres were able to last the entire distance for two reasons: the laps he slowed to cool the brakes, and the smooth ride given by the active suspension.

Qualifying

Pos	No	Driver	Constructor	Q1	Q2	Gap
1	5	Nigel Mansell	Williams-Honda	1:42.223	1:39.264
2	12	Ayrton Senna	Lotus-Honda	1:42.985	1:40.607	+1.343
3	6	Nelson Piquet	Williams-Honda	1:43.152	1:40.942	+1.678
4	20	Thierry Boutsen	Benetton-Ford	1:44.686	1:42.050	+2.786
5	1	Alain Prost	McLaren-TAG	1:46.042	1:42.357	+3.093
6	18	Eddie Cheever	Arrows-Megatron	1:45.296	1:42.361	+3.097
7	27	Michele Alboreto	Ferrari	1:45.437	1:42.684	+3.420
8	19	Teo Fabi	Benetton-Ford	1:47.064	1:42.918	+3.654
9	7	Riccardo Patrese	Brabham-BMW	1:46.932	1:43.479	+4.215
10	17	Derek Warwick	Arrows-Megatron	1:45.234	1:43.541	+4.277
11	2	Stefan Johansson	McLaren-TAG	1:46.623	1:43.797	+4.533
12	28	Gerhard Berger	Ferrari	1:45.054	1:43.816	+4.552
13	3	Jonathan Palmer	Tyrrell-Ford	1:47.010	1:44.350	+5.086
14	4	Philippe Streiff	Tyrrell-Ford	1:47.963	1:45.037	+5.773
15	9	Martin Brundle	Zakspeed	1:48.932	1:45.291	+6.027
16	10	Christian Danner	Zakspeed	1:48.867	1:45.740	+6.476
17	8	Andrea de Cesaris	Brabham-BMW	1:47.670	1:46.046	+6.782
18	24	Alessandro Nannini	Minardi-Motori Moderni	1:46.449	1:46.083	+6.819
19	21	Alex Caffi	Osella-Alfa Romeo	1:55.787	1:46.124	+6.860
20	30	Philippe Alliot	Lola-Ford	1:47.470	1:46.194	+6.930
21	25	René Arnoux	Ligier-Megatron	1:48.338	1:46.211	+6.947
22	16	Ivan Capelli	March-Ford	1:49.969	1:46.269	+7.005
23	26	Piercarlo Ghinzani	Ligier-Megatron	1:48.661	1:47.471	+8.207
24	11	Satoru Nakajima	Lotus-Honda	1:51.355	1:48.801	+9.537
25	23	Adrián Campos	Minardi-Motori Moderni	1:50.495	3:26.319	+11.231
26	14	Pascal Fabre	AGS-Ford	1:57.475	1:53.644	+14.380

Race

Pos	No	Driver	Constructor	Laps	Time/Retired	Grid	Points
1	12	Ayrton Senna	Lotus-Honda	63	1:50:16.358	2	9
2	6	Nelson Piquet	Williams-Honda	63	+ 33.819	3	6
3	1	Alain Prost	McLaren-TAG	63	+ 45.327	5	4
4	28	Gerhard Berger	Ferrari	63	+ 1:02.601	12	3
5	5	Nigel Mansell	Williams-Honda	62	+ 1 Lap	1	2
6	18	Eddie Cheever	Arrows-Megatron	60	+ 3 Laps	6	1
7	2	Stefan Johansson	McLaren-TAG	60	+ 3 Laps	11
8	10	Christian Danner	Zakspeed	60	+ 3 Laps	16
9	7	Riccardo Patrese	Brabham-BMW	60	+ 3 Laps	9
10	25	René Arnoux	Ligier-Megatron	60	+ 3 Laps	21
11 (1)	3	Jonathan Palmer	Tyrrell-Ford	60	+ 3 Laps	13
12 (2)	14	Pascal Fabre	AGS-Ford	58	+ 5 Laps	26
Ret	20	Thierry Boutsen	Benetton-Ford	52	Brakes	4
Ret	26	Piercarlo Ghinzani	Ligier-Megatron	51	Clutch	23
Ret	4	Philippe Streiff	Tyrrell-Ford	44	Wheel	14
Ret	30	Philippe Alliot	Lola-Ford	38	Accident	20
Ret	27	Michele Alboreto	Ferrari	25	Gearbox	7
Ret	24	Alessandro Nannini	Minardi-Motori Moderni	22	Gearbox	18
Ret	9	Martin Brundle	Zakspeed	16	Turbo	15
Ret	17	Derek Warwick	Arrows-Megatron	12	Accident	10
Ret	16	Ivan Capelli	March-Ford	9	Electrical	22
Ret	19	Teo Fabi	Benetton-Ford	6	Accident	8
Ret	21	Alex Caffi	Osella-Alfa Romeo	3	Transmission	19
Ret	8	Andrea de Cesaris	Brabham-BMW	2	Gearbox	17
Ret	23	Adrián Campos	Minardi-Motori Moderni	1	Accident	25
Ret	11	Satoru Nakajima	Lotus-Honda	0	Collision	24
Source:[2]

• Numbers in brackets refer to positions of normally aspirated entrants competing for the Jim Clark Trophy.