1991-3-San Marino
XI Gran Premio di San Marino
Imola, 28 aprile 1991
61 giri x 5.040 km – 307.440 km
ELENCO ISCRITTI
| N° | Pilota | Squadra | Telaio | Motore | ||
| 1 | Ayrton SENNA | Honda Marlboro McLaren | McLaren | MP4/6 | Honda | RA121E V12 3.5 |
| 2 | Gerhard BERGER | Honda Marlboro McLaren | McLaren | MP4/6 | Honda | RA121E V12 3.5 |
| 3 | Satoru NAKAJIMA | Braun Tyrrell Honda | Tyrrell | 020 | Honda | RA101E V10 3.5 |
| 4 | Stefano MODENA | Braun Tyrrell Honda | Tyrrell | 020 | Honda | RA101E V10 3.5 |
| 5 | Nigel MANSELL | Canon Williams Team | Williams | FW14 | Renault | RS3 V10 3.5 |
| 6 | Riccardo PATRESE | Canon Williams Team | Williams | FW14 | Renault | RS3 V10 3.5 |
| 7 | Martin BRUNDLE | Motor Racing Developments Ltd | Brabham | BT60Y | Yamaha | OX99 V12 3.5 |
| 8 | Mark BLUNDELL | Motor Racing Developments Ltd | Brabham | BT60Y | Yamaha | OX99 V12 3.5 |
| 9 | Michele ALBORETO | Footwork Grand Prix International | Footwork | A11C | Porsche | V12 3.5 |
| 10 | Alex CAFFI | Footwork Grand Prix International | Footwork | FA12 | Porsche | V12 3.5 |
| 11 | Mika HAKKINEN | Team Lotus | Lotus | 102B | Judd | EV V8 3.5 |
| 12 | Julian BAILEY | Team Lotus | Lotus | 102B | Judd | EV V8 3.5 |
| 14 | Olivier GROUILLARD | Fondmetal F1 | Fondmetal | F1 | Ford Cosworth | DFR V8 3.5 |
| 15 | Mauricio GUGELMIN | Leyton House Racing | Leyton House | CG911 | Ilmor | LH10 V10 3.5 |
| 16 | Ivan CAPELLI | Leyton House Racing | Leyton House | CG911 | Ilmor | LH10 V10 3.5 |
| 17 | Gabriele TARQUINI | AGS Racing | AGS | JH25B | Ford Cosworth | DFR V8 3.5 |
| 18 | Fabrizio BARBAZZA | AGS Racing | AGS | JH25B | Ford Cosworth | DFR V8 3.5 |
| 19 | Roberto MORENO | Camel Benetton Ford | Benetton | B191 | Ford Cosworth | HB V8 3.5 |
| 20 | Nelson PIQUET | Camel Benetton Ford | Benetton | B191 | Ford Cosworth | HB V8 3.5 |
| 21 | Emanuele PIRRO | BMS Scuderia Italia | Dallara | 191 | Judd | GV V10 3.5 |
| 22 | JJ LEHTO | BMS Scuderia Italia | Dallara | 191 | Judd | GV V10 3.5 |
| 23 | Pierluigi MARTINI | Minardi F1 Team | Minardi | M191 | Ferrari | 037 V12 3.5 |
| 24 | Gianni MORBIDELLI | Minardi F1 Team | Minardi | M191 | Ferrari | 037 V12 3.5 |
| 25 | Thierry BOUTSEN | Ligier Gitanes | Ligier | JS35 | Lamborghini | 3512 V12 3.5 |
| 26 | Erik COMAS | Ligier Gitanes | Ligier | JS35 | Lamborghini | 3512 V12 3.5 |
| 27 | Alain PROST | Scuderia Ferrari SpA | Ferrari | 642 | Ferrari | 037 V12 3.5 |
| 28 | Jean ALESI | Scuderia Ferrari SpA | Ferrari | 642 | Ferrari | 037 V12 3.5 |
| 29 | Eric BERNARD | Larrousse F1 | Lola | 91 | Ford Cosworth | DFR V8 3.5 |
| 30 | Aguri SUZUKI | Larrousse F1 | Lola | 91 | Ford Cosworth | DFR V8 3.5 |
| 31 | Pedro CHAVES | Coloni Racing Srl | Coloni | C4 | Ford Cosworth | DFR V8 3.5 |
| 32 | Bertrand GACHOT | Team 7Up Jordan | Jordan | 191 | Ford Cosworth | HB V8 3.5 |
| 33 | Andrea De CESARIS | Team 7Up Jordan | Jordan | 191 | Ford Cosworth | HB V8 3.5 |
| 34 | Nicola LARINI | Modena Team SpA | Lamborghini | 291 | Lamborghini | 3512 V12 3.5 |
| 35 | Eric van de POELE | Modena Team SpA | Lamborghini | 291 | Lamborghini | 3512 V12 3.5 |
QUALIFICHE
| Pos | Pilota | Telaio | Motore | Tempo |
| 1 | Ayrton SENNA | McLaren | Honda | 1’21”877 |
| 2 | Riccardo PATRESE | Williams | Renault | 1’21”957 |
| 3 | Alain PROST * | Ferrari | Ferrari | 1’22”195 |
| 4 | Nigel MANSELL | Williams | Renault | 1’22”366 |
| 5 | Gerhard BERGER | McLaren | Honda | 1’22”567 |
| 6 | Stefano MODENA | Tyrrell | Honda | 1’23”511 |
| 7 | Jean ALESI | Ferrari | Ferrari | 1’23”945 |
| 8 | Gianni MORBIDELLI | Minardi | Ferrari | 1’24”762 |
| 9 | Pierluigi MARTINI | Minardi | Ferrari | 1’24”807 |
| 10 | Satoru NAKAJIMA | Tyrrell | Honda | 1’25”345 |
| 11 | Andrea De CESARIS | Jordan | Ford Cosworth | 1’25”491 |
| 12 | Bertrand GACHOT | Jordan | Ford Cosworth | 1’25”531 |
| 13 | Roberto MORENO | Benetton | Ford Cosworth | 1’25”655 |
| 14 | Nelson PIQUET | Benetton | Ford Cosworth | 1’25”809 |
| 15 | Mauricio GUGELMIN | Leyton House | Ilmor | 1’25”841 |
| 16 | JJ LEHTO | Dallara | Judd | 1’25”974 |
| 17 | Eric BERNARD | Lola | Ford Cosworth | 1’25”983 |
| 18 | Martin BRUNDLE | Brabham | Yamaha | 1’26”055 |
| 19 | Erik COMAS | Ligier | Lamborghini | 1’26”207 |
| 20 | Aguri SUZUKI | Lola | Ford Cosworth | 1’26”356 |
| 21 | Eric van de POELE | Lamborghini | Lamborghini | 1’26”550 |
| 22 | Ivan CAPELLI | Leyton House | Ilmor | 1’26”602 |
| 23 | Mark BLUNDELL | Brabham | Yamaha | 1’26”778 |
| 24 | Thierry BOUTSEN | Ligier | Lamborghini | 1’26”998 |
| 25 | Mika HAKKINEN | Lotus | Judd | 1’27”324 |
| 26 | Julian BAILEY | Lotus | Judd | 1’27”976 |
| Non qualificato | ||||
| 27 | Gabriele TARQUINI | AGS | Ford Cosworth | 1’28”175 |
| 28 | Fabrizio BARBAZZA | AGS | Ford Cosworth | 1’29”665 |
| 29 | Alex CAFFI | Footwork | Porsche | 1’30”280 |
| 30 | Michele ALBORETO | Footwork | Porsche | 1’30”762 |
| Non prequalificato | ||||
| 31 | Emanuele PIRRO | Dallara | Judd | 1’26”305 |
| 32 | Olivier GROUILLARD | Fondmetal | Ford Cosworth | 1’26”789 |
| 33 | Nicola LARINI | Lamborghini | Lamborghini | 1’26”886 |
| 34 | Pedro CHAVES | Coloni | Ford Cosworth | 1’31”239 |
CLASSIFICA
| Pos | N° | Pilota | Telaio | Motore | Giro | |
| 1 | 1 | Ayrton SENNA | McLaren | Honda | 61 | 1h 35m 14.750s ( 193.671 km/h ) |
| 2 | 2 | Gerhard BERGER | McLaren | Honda | 61 | 1h 35m 16.425s ( +01.675s ) |
| 3 | 22 | JJ LEHTO | Dallara | Judd | 60 | |
| 4 | 23 | Pierluigi MARTINI | Minardi | Ferrari | 59 | |
| 5 | 11 | Mika HAKKINEN | Lotus | Judd | 58 | |
| 6 | 12 | Julian BAILEY | Lotus | Judd | 58 | |
| 7 | 25 | Thierry BOUTSEN | Ligier | Lamborghini | 58 | |
| 8 | 8 | Mark BLUNDELL | Brabham | Yamaha | 58 | |
| 9 | 35 | Eric van de POELE | Lamborghini | Lamborghini | 57 | |
| 10 | 26 | Erik COMAS | Ligier | Lamborghini | 57 | |
| 11 | 7 | Martin BRUNDLE | Brabham | Yamaha | 57 | |
| 12 | 15 | Mauricio GUGELMIN | Leyton House | Ilmor | 55 | |
| 13 | 19 | Roberto MORENO | Benetton | Ford Cosworth | 54 | |
| ab | 4 | Stefano MODENA | Tyrrell | Honda | 41 | |
| ab | 33 | Andrea De CESARIS | Jordan | Ford Cosworth | 37 | |
| ab | 32 | Bertrand GACHOT | Jordan | Ford Cosworth | 37 | |
| ab | 16 | Ivan CAPELLI | Leyton House | Ilmor | 24 | |
| ab | 29 | Eric BERNARD | Lola | Ford Cosworth | 17 | |
| ab | 6 | Riccardo PATRESE | Williams | Renault | 17 | |
| ab | 3 | Satoru NAKAJIMA | Tyrrell | Honda | 15 | |
| ab | 24 | Gianni MORBIDELLI | Minardi | Ferrari | 10 | |
| ab | 28 | Jean ALESI | Ferrari | Ferrari | 2 | |
| ab | 30 | Aguri SUZUKI | Lola | Ford Cosworth | 2 | |
| ab | 20 | Nelson PIQUET | Benetton | Ford Cosworth | 1 | |
| ab | 5 | Nigel MANSELL | Williams | Renault | 0 |
GIRO VELOCE
| Pilota | Telaio | Motore | Tempo | Gap | Giro | Media |
| Gerhard BERGER | McLaren | Honda | 1’26”531 | 55 | 209.682 |
