1991 Mexican Grand Prix

The actual race needed three attempts to get underway: the first start was aborted when a fire marshal thought he saw a fire in the back of JJ Lehto's Dallara and jumped onto the track, while Grouillard stalled at the second start and was relegated to the back of the grid.

At the third start, Patrese made a poor getaway and dropped to fourth behind Mansell, Alesi and Senna. Senna quickly overtook Alesi, while further back, Piquet and Prost dropped behind Modena and Prost also dropped behind the fast-starting Jordan of Andrea de Cesaris. Berger, meanwhile, suffered his third consecutive early retirement when his engine exploded on lap 5, the resulting oil causing Pierluigi Martini to spin off in his Minardi. Patrese started his recovery by overtaking Alesi and then out-braking Senna into turn 1, putting him into second behind Mansell.

On lap 15, Patrese passed his team-mate, who was having engine overheating concerns, for the lead. Mansell fell back towards Senna, Piquet, de Cesaris, Moreno and Alesi (who had spun), but eventually the concerns faded and the Englishman pulled away again. Alesi passed Moreno and de Cesaris for fifth, only for his clutch to fail on lap 43, team-mate Prost having dropped out on lap 17 with an alternator failure. Piquet's race ended on lap 45 with a broken wheel bearing, and when Moreno had a pit stop go wrong, Bertrand Gachot found himself fifth in the second Jordan, before spinning off.

Patrese eventually finished 1.3 seconds ahead of Mansell, with Senna almost a minute further back. De Cesaris held on to fourth after his throttle failed on the last lap and he pushed his car over the line, the stewards deciding that he had not broken the rules by starting to push after the race had ended. Moreno recovered from his botched pit stop to take fifth, while Larrousse's Éric Bernard finished sixth, the last point scored by a chassis manufactured by Lola Cars.

Pos	No	Driver	Constructor	Laps	Time/Retired	Grid	Points
1	6	Riccardo Patrese	Williams-Renault	67	1:29:52.205	1	10
2	5	Nigel Mansell	Williams-Renault	67	+ 1.336	2	6
3	1	Ayrton Senna	McLaren-Honda	67	+ 57.356	3	4
4	33	Andrea de Cesaris	Jordan-Ford	66	+ 1 lap	11	3
5	19	Roberto Moreno	Benetton-Ford	66	+ 1 lap	9	2
6	29	Éric Bernard	Lola-Ford	66	+ 1 lap	18	1
7	24	Gianni Morbidelli	Minardi-Ferrari	66	+ 1 lap	23
8	25	Thierry Boutsen	Ligier-Lamborghini	65	+ 2 laps	14
9	11	Mika Häkkinen	Lotus-Judd	65	+ 2 laps	24
10	12	Johnny Herbert	Lotus-Judd	65	+ 2 laps	25
11	4	Stefano Modena	Tyrrell-Honda	65	+ 2 laps	8
12	3	Satoru Nakajima	Tyrrell-Honda	64	+ 3 laps	13
Ret	8	Mark Blundell	Brabham-Yamaha	54	Engine	12
Ret	32	Bertrand Gachot	Jordan-Ford	51	Spun off	20
Ret	30	Aguri Suzuki	Lola-Ford	48	Gearbox	19
Ret	20	Nelson Piquet	Benetton-Ford	44	Wheel bearing	6
Ret	28	Jean Alesi	Ferrari	42	Clutch	4
Ret	22	JJ Lehto	Dallara-Judd	30	Engine	16
Ret	9	Michele Alboreto	Footwork-Porsche	24	Engine	26
Ret	7	Martin Brundle	Brabham-Yamaha	20	Wheel	17
Ret	16	Ivan Capelli	Leyton House-Ilmor	19	Engine	22
Ret	27	Alain Prost	Ferrari	16	Alternator	7
Ret	15	Maurício Gugelmin	Leyton House-Ilmor	15	Engine	21
Ret	14	Olivier Grouillard	Fondmetal-Ford	13	Engine	10
Ret	2	Gerhard Berger	McLaren-Honda	5	Engine	5
Ret	23	Pierluigi Martini	Minardi-Ferrari	4	Spun off	15
DNQ	26	Érik Comas	Ligier-Lamborghini
DNQ	17	Gabriele Tarquini	AGS-Ford
DNQ	10	Stefan Johansson	Footwork-Porsche
DNQ	18	Fabrizio Barbazza	AGS-Ford
DNPQ	35	Eric van de Poele	Lambo-Lamborghini
DNPQ	31	Pedro Chaves	Coloni-Ford
DNPQ	21	Emanuele Pirro	Dallara-Judd
EX	34	Nicola Larini	Lambo-Lamborghini		Rear wing infringement
Source:[3]

Drivers' Championship standings Pos Driver Points 1 Ayrton Senna 44 2 2 Riccardo Patrese 20 1 3 Nelson Piquet 16 3 4 Nigel Mansell 13 2 5 Alain Prost 11 Source:[4]

Constructors' Championship standings Pos Constructor Points 1 McLaren-Honda 54 1 2 Williams-Renault 33 1 3 Benetton-Ford 21 4 Ferrari 16 5 Tyrrell-Honda 11 Source:[4]

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