PORSCHE RACING HISTORYPorsche 911 Carrera RSR - Chassis No. 911 460 0085
One of 15 RSRs specially built for Roger Penske’s IROC Series and is one of just a few of the 15 RSRs that competed in all four of the races. 1973 - Roger Penske aquired new from Porsche 1974 - Klaus Bytzek, Canada 1978 - Jacques Bienvenue, Canada 1980 - David Deacon, Canada 1988 - Harry Bytzek, Canada 1994 - Jack Boxstrom, Canada 2002 - Karl Singer 2002 - Lloyd Hawkins 2022 - Amelia Island Auction - Sold for $1,627,500
27 October 1973 - IROC Riverside 1 - IROC - International Race of Champions
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 11 | Porsche 911 Carrera RSR | 911 460 0085 | Gordon Johncock (USA) | Roger Penske (USA) | 10th | 9th | 28 laps |
27 October 1973 - IROC Riverside 2 - IROC - International Race of Champions
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 3 | Porsche 911 Carrera RSR | 911 460 0085 | Peter Revson (USA) | Roger Penske (USA) | 4th | 10th | 30 laps |
28 October 1973 - IROC Riverside 3 - IROC - International Race of Champions
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 9 | Porsche 911 Carrera RSR | 911 460 0085 | Gordon Johncock (USA) | Roger Penske (USA) | 11th | 4th | 9 laps - Throttle Linkage |
14 February 1974 - IROC Daytona - IROC - International Race of Champions
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 6 | Porsche 911 Carrera RSR | 911 460 0085 | A. J. Foyt (USA) | Roger Penske (USA) | 6th | 6th | 2 laps - Engine |