500 Cc Classification
| Pos | Rider | Manufacturer | Laps | Time | Grid | Points |
|---|---|---|---|---|---|---|
| 1 | Michael Doohan | Honda | 36 | 46:27.037 | 5 | 20 |
| 2 | John Kocinski | Yamaha | 36 | +8.677 | 2 | 17 |
| 3 | Eddie Lawson | Cagiva | 36 | +14.319 | 4 | 15 |
| 4 | Alex Barros | Cagiva | 36 | +23.151 | 7 | 13 |
| 5 | Jean-Philippe Ruggia | Yamaha | 36 | +23.561 | 8 | 11 |
| 6 | Doug Chandler | Yamaha | 36 | +28.135 | 6 | 10 |
| 7 | Kevin Schwantz | Suzuki | 36 | +28.480 | 3 | 9 |
| 8 | Juan Garriga | Yamaha | 36 | +48.073 | 10 | 8 |
| 9 | Wayne Rainey | Yamaha | 36 | +1:11.518 | 1 | 7 |
| 10 | Eddie Laycock | Yamaha | 35 | +1 lap | 12 | 6 |
| 11 | Marco Papa | Honda | 35 | +1 lap | 14 | 5 |
| 12 | Cees Doorakkers | Honda | 34 | +2 laps | 15 | 4 |
| 13 | Romolo Balbi | Honda | 34 | +2 laps | 13 | 3 |
| 14 | Simon Buckmaster | Suzuki | 33 | +3 laps | 2 | |
| 15 | Michael Rudroff | Honda | 33 | +3 laps | 1 | |
| Ret | Didier de Radiguès | Suzuki | 29 | Retired | 9 | |
| Ret | Adrien Morillas | Yamaha | 29 | Retired | 11 | |
| Ret | Hans Becker | Yamaha | 25 | Retired | ||
| Ret | Niggi Schmassman | Honda | 9 | Retired | ||
| DNQ | Helmut Schutz | Honda | ||||
| DNQ | Andreas Leuthe | Honda | ||||
| DNQ | Larry Vacondio | Honda | ||||
Read more about this topic: 1991 Italian Motorcycle Grand Prix