PORSCHE RACING HISTORYPreben Kristoffersen (DK)
1978 : Silverstone 6 Hours - 1st in class
19 March 1978 - Mugello 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 14 | Porsche 911 Carrera RSR | GT | Preben Kristoffersen (DK)/Eberhard Sindel (D) | Wrangler Racing (DK) | DNF | 21st |
22 April 1978 - Dijon 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 32 | Porsche 934 | 006 00022 | GT | Eberhard Sindel (D)/Preben Kristoffersen (DK) | Preben Kristoffersen (DK) | DNF | 22nd | 88 laps - Turbocharger |
14 May 1978 - Silverstone 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 25 | Porsche 934 | 006 00022 | GT | Eberhard Sindel (D)/Preben Kristoffersen (DK) | Wrangler Racing Team (DK) | 7th | 1st | 20th | 198 laps |
28 May 1978 - Nürburgring 1000 km - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 47 | Porsche 934 | 006 00022 | T/GT+2.0 | Eberhard Sindel (D)/Preben Kristoffersen (DK) | Wrangler-Racing-Team (DK) | DNF | 30th | 19 laps - DNF |
25 June 1978 - Misano 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 11 | Porsche 934 | 006 00022 | GT | Preben Kristoffersen (DK)/Eberhard Sindel (D) | Preben Kristoffersen (DK) | DNF | 13th | 182 laps - Accident |