Riccardo Patrese's victory and Mansell's disqualification shifted the 1991 Drivers' Championship, extending Senna's lead to 24 points with three races left.
Key Facts
- Race winner
- Riccardo Patrese (Williams-Renault)
- Number of laps
- 71 laps
- Championship round
- 13th race of the 1991 season
- Senna's championship lead
- 24 points over Mansell after race points
- Patrese start position
- Pole position
- Races remaining in season
- 3 races
By the Numbers
Location
Cause → Event → Consequence
Riccardo Patrese started from pole position at the Autódromo do Estoril, while his Williams-Renault teammate Nigel Mansell led the race until a pit stop was mishandled, resulting in a wheel not being properly secured and Mansell being disqualified from the event.
The 71-lap 1991 Portuguese Grand Prix was held on 22 September 1991, with Patrese taking victory for Williams-Renault. Ayrton Senna finished second in his McLaren-Honda, and Jean Alesi claimed third place for Ferrari, while Mansell's disqualification removed him from the results.
Mansell's disqualification cost him valuable championship points, extending Senna's lead in the 1991 Drivers' Championship to 24 points with only three races remaining in the season, significantly improving Senna's prospects of claiming the title.