PORSCHE RACING HISTORYBobby Allison (USA)
1973
27 October 1973 - IROC Riverside 1 - IROC - International Race of Champions
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 9 | Porsche 911 Carrera RSR | 911 460 0035 | Bobby Allison (USA) | Roger Penske (USA) | 11th | 7th | 14 laps - Transmission |
27 October 1973 - IROC Riverside 2 - IROC - International Race of Champions
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 11 | Porsche 911 Carrera RSR | 911 460 0116 | Bobby Allison (USA) | Roger Penske (USA) | 7th | 2nd | 30 laps |
28 October 1973 - IROC Riverside 3 - IROC - International Race of Champions
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 7 | Porsche 911 Carrera RSR | 911 460 0035 | Bobby Allison (USA) | Roger Penske (USA) | 9th | 6th | 20 laps - Engine |