PORSCHE RACING HISTORYHarald Grohs (D)
1986
24 August 1986 - Nürburgring 1000 km - World Sports-Prototype Championship
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 9 | Porsche 956 | 956-109 | C1 | Jürgen Lässig (D)/Harald Grohs (D)/Fulvio Ballabio (I) | Obermaier Racing (D) | 4th | 4th | 14th | 115 laps |
5 October 1986 - Fuji 1000 km - World Sports-Prototype Championship
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 8 | Porsche 956 | 956-104 | C1 | Kris Nissen (DK)/"John Winter" Louis Krages (D)/Harald Grohs (D) | Joest Racing (D) | 5th | 5th | 21st | 223 laps |