1991 Portuguese Grand Prix
- Round
- 13 of 1991
- Circuit
- Autodromo do Estoril
- Location
- Estoril, Portugal
- Dates
- —
- Format
- Standard weekend
- Winner
- Riccardo Patrese
- Constructor
- Williams
- Entrant
- Williams-Renault
- Pole position
- Riccardo Patrese
- Fastest lap
- Nigel Mansell
- Confidence
- reference