PORSCHE RACING HISTORY935 L1
1981
10 May 1981 - Silverstone 6 Hours - World Championship for Drivers and Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 58 | Porsche 935 L1 | 935 L1 | Gr.5 | Mike Wilds (GB)/Jan Lundgardh (S) | Tuff-Kote Dinol Racing (S) | DNF | 22nd | 177 laps - Accident |
24 May 1981 - Nürburgring 1000 Km - World Championship for Drivers and Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 42 | Porsche 935 L1 | 935 L1 | Gr.5 | Jan Lundgardh (S) | Tuff-Kote Dinol Racing (S) | 40th | 13th | 57th | 13 laps |
14 June 1981 - Le Mans 24 Hours - World Championship for Drivers and Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 69 | Porsche 935 L1 | 935 L1 | Gr.5 | Jan Lundgardh (S)/Mike Wilds (GB)/Axel Plankenhorn (D) | Tuff-Kote Dinol Racing (S) | DNF | 50th | 49 laps - Engine |
27 September 1981 - Brands Hatch 1000 km - World Championship for Drivers and Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 33 | Porsche 935 L1 | 935 L1 | Gr.5 | Jan Lundgardh (S)/"Umberto Calvo" (A) | Tuff Kote Dinol (S) | 19th | 6th | 30th | 186 laps |