PORSCHE RACING HISTORYPorsche 911 Carrera RSR - Chassis No. 911 460 0025
One of 15 RSRs specially built for Roger Penske’s IROC Series 1973 - Roger Penske aquired new from Porsche
27 October 1973 - IROC Riverside 1 - IROC - International Race of Champions
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 2 | Porsche 911 Carrera RSR | 911 460 0025 | Mark Donohue (USA) | Roger Penske (USA) | 1st | 1st | 30 laps |
27 October 1973 - IROC Riverside 2 - IROC - International Race of Champions
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 12 | Porsche 911 Carrera RSR | 911 460 0025 | Emerson Fittipaldi (BR) | Roger Penske (USA) | 3rd | 1st | 30 laps |
28 October 1973 - IROC Riverside 3 - IROC - International Race of Champions
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 10 | Porsche 911 Carrera RSR | 911 460 0025 | Richard Petty (USA) | Roger Penske (USA) | 10th | 3rd | 19 laps - Throttle Linkage |
13 July 1974 - Watkins Glen 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 65 | Porsche 911 Carrera RSR | 911 460 0025 | TA | Jacques Bienvenue (CDN)/Marc Dancose (CDN)/Eugenio Baturone (E) | Jacques Bienvenue (CDN) | 6th | 4th | 18th | 164 laps |