PORSCHE RACING HISTORYChassis No. 935 L1
16 March 1980 - Brands Hatch 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 18 | Porsche 935 L1 | 935 L1 | Gr.5 | Jan Lundgardh (S)/Kurt Simonsen (S)/Preben Kristoffersen (DK) | Tuff-Kote Dinol Racing (S) | NC | 25th | 129 laps |
25 May 1980 - Nürburgring 1000 km - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 24 | Porsche 935 L1 | 935 L1 | Gr.5 | Jan Lundgardh (S)/Kennerth Persson (S) | Tuff-Kote Dinol Racing (S) | DNF | 24th | 2 laps - DNF |
24 August 1980 - DRM Zolder Westfalen-Pokal - DRM - Deutsche Rennsport Meisterschaft
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 64 | Porsche 935 L1 | 935 L1 | Gr.5 | Jan Lundgardh (S) | Tuff-Kote Dinol Racing (S) | 7th | 7th | 11th | 22 laps |
7 September 1980 - Vallelunga 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 28 | Porsche 935 L1 | 935 L1 | Gr.5 | Jan Lundgardh (S)/Eberhard Braun (D) | Tuff-Kote Dinol Racing (S) | 13th | 5th | 30th | 225 laps |
28 September 1980 - Dijon 1000 Kilometres - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 23 | Porsche 935 L1 | 935 L1 | Gr.5 2.0 | Jan Lundgardh (S)/Eberhard Braun (D)/"James Bald" (A) | Lundgardh/Dinitrol Center (S) | DNF | 22nd | 54 laps - DNF |
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 |
16 May 1982 - Silverstone 6 Hours - World Endurance Championship
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 68 | Porsche 935 L1 | 935 L1 | Gr.5 | Jan Lundgardh (S)/Per Sturesen (S) | Jan Lundgardh | 14th | 4th | 35th | 204 laps |
15 July 1984 - Nürburgring 1000 km - World Endurance Championship
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 65 | Porsche 935 L1 | 935 L1 | GTX | Jan Lundgardh (S)/Kurt Simonsen (S) | Tuff Kote Dinol Racing | 18th | 1st | 33rd | 174 laps |