PORSCHE RACING HISTORYHarald Grohs (D)
1980 : Silverstone 6 Hours - 2nd in class : Le Mans 24 Hours - 1st in class
16 March 1980 - Brands Hatch 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 15 | Porsche 935/77A | 930 890 0012 | Gr.5 | Dieter Schornstein (D)/Harald Grohs (D) | Vegla Racing Team Aachen (D) | 7th | 6th | 11th | 135 laps |
11 May 1980 - Silverstone 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 16 | Porsche 935/77A | 930 890 0012 | Gr.5 | Dieter Schornstein (D)/Harald Grohs (D) | Vegla Racing Team (D) | 5th | 2nd | 9th | 228 laps |
25 May 1980 - Nürburgring 1000 km - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 5 | Porsche 935/77A | 930 890 0012 | Gr.5 | Dieter Schornstein (D)/Harald Grohs (D) | Vegla Racing Team (D) | 7th | 5th | 10th | 42 laps |
15 June 1980 - Le Mans 24 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 49 | Porsche 935/77A | 930 890 0012 | Gr.5 | Dieter Schornstein (D)/Harald Grohs (D)/Götz von Tschirnhaus (D) | Vegla Racing Team (D) | 8th | 1st | 11th | 314 laps |
5 July 1980 - Watkins Glen 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 13 | Porsche 935 | 930 770 0905 | Gr.5 | Harald Grohs (D)/Randolph Townsend (USA) | Andial Racing (USA) | 8th | 8th | 4th | 130 laps |