PORSCHE RACING HISTORYSiegfried Lang (CH)
1969
25 April 1969 - Monza 1000 km - International Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 8 | Porsche 907 2.2 | 907-025 | P3.0 | Rolf Stommelen (D)/Siegfried Lang (CH) | Siegfried Lang | DNF | 19th | 48 laps - Overheating |
13 July 1969 - Solituderennen Hockenheim - Non Championship Race
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 17 | Porsche 907 | 907-025 | P3.0 | Siegfried Lang (CH) | Sigi Lang (CH) | 10th | 7th | 14th | 20 laps |