1990 Portuguese Grand Prix

At the start, with both Ferraris on the front row (Mansell on pole, Alain Prost second), Mansell got too much wheelspin and slid across the track towards Prost, who had to avoid being shunted into the pitwall. All of this allowed the McLarens of Ayrton Senna and Gerhard Berger to slip past Mansell and Prost to make it a McLaren 1–2 with Senna leading into the first corner. After all the mid race tyre stops, it was Senna who emerged as the race leader, followed by Mansell, Berger, and Prost. A few laps later Mansell had caught Senna and passed him into turn one (Senna letting him through, unlike the year before when they collided).

On lap 52, race leader Nigel Mansell was attempting to lap the Ligier JS33B of Philippe Alliot when the Frenchman stuck to the racing line by driving inches in front of Mansell into the inside of "Curva 2" corner. However, the right rear wheel of his car hit the left front of Mansell's Ferrari and Alliot was sent spinning into the Armco barrier. Mansell came out unscathed from this incident, and eventually won the race which was stopped early due to an accident between Suzuki and Caffi.

Ferrari announced that Jean Alesi would partner Alain Prost for 1991. Alesi was reported to have already signed a contract with Williams, but changed his mind when Ferrari showed an interest, feeling that this would give him a better chance of winning a championship.^{[citation needed]}

By winning this race, Mansell tied Stirling Moss' longstanding record of most F1 Grand Prix wins without a Drivers' Championship, at 16. Mansell would then extend it to 29 across the next two years, until finally clinching the title at the 1992 Hungarian Grand Prix, at which point Moss would have that record handed back to him.

Pos	No	Driver	Constructor	Laps	Time/Retired	Grid	Points
1	2	Nigel Mansell	Ferrari	61	1:22:11.014	1	9
2	27	Ayrton Senna	McLaren-Honda	61	+ 2.808	3	6
3	1	Alain Prost	Ferrari	61	+ 4.189	2	4
4	28	Gerhard Berger	McLaren-Honda	61	+ 5.896	4	3
5	20	Nelson Piquet	Benetton-Ford	61	+ 57.418	6	2
6	19	Alessandro Nannini	Benetton-Ford	61	+ 58.249	9	1
7	6	Riccardo Patrese	Williams-Renault	60	+ 1 lap	5
8	4	Jean Alesi	Tyrrell-Ford	60	+ 1 lap	8
9	9	Michele Alboreto	Arrows-Ford	60	+ 1 lap	19
10	25	Nicola Larini	Ligier-Ford	59	+ 2 laps	22
11	23	Pierluigi Martini	Minardi-Ford	59	+ 2 laps	16
12	15	Maurício Gugelmin	Leyton House-Judd	59	+ 2 laps	14
13	10	Alex Caffi	Arrows-Ford	58	Collision	17
14	30	Aguri Suzuki	Lola-Lamborghini	58	Collision	11
15	21	Emanuele Pirro	Dallara-Ford	58	+ 3 laps	13
Ret	26	Philippe Alliot	Ligier-Ford	52	Accident	20
Ret	7	David Brabham	Brabham-Judd	52	Gearbox	25
Ret	16	Ivan Capelli	Leyton House-Judd	51	Engine	12
Ret	5	Thierry Boutsen	Williams-Renault	30	Engine	7
Ret	29	Éric Bernard	Lola-Lamborghini	24	Gearbox	10
Ret	8	Stefano Modena	Brabham-Judd	21	Gearbox	23
Ret	12	Martin Donnelly	Lotus-Lamborghini	14	Alternator	15
Ret	11	Derek Warwick	Lotus-Lamborghini	5	Throttle	21
Ret	18	Yannick Dalmas	AGS-Ford	3	Halfshaft	24
Ret	22	Andrea de Cesaris	Dallara-Ford	0	Spun off	18
DNS	3	Satoru Nakajima	Tyrrell-Ford		Driver unwell
DNQ	14	Olivier Grouillard	Osella-Ford
DNQ	24	Paolo Barilla	Minardi-Ford
DNQ	17	Gabriele Tarquini	AGS-Ford
DNQ	31	Bertrand Gachot	Coloni-Ford
DNPQ	33	Roberto Moreno	EuroBrun-Judd
DNPQ	34	Claudio Langes	EuroBrun-Judd
DNPQ	39	Bruno Giacomelli	Life-Judd
Source:[5]

Drivers' Championship standings Pos Driver Points 1 Ayrton Senna 78 2 Alain Prost 60 3 Gerhard Berger 40 4 Thierry Boutsen 27 5 Nelson Piquet 26 Source:[6]

Constructors' Championship standings Pos Constructor Points 1 McLaren-Honda 118 2 Ferrari 85 3 Williams-Renault 44 4 Benetton-Ford 43 5 Tyrrell-Ford 15 Source:[6]

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