PORSCHE RACING HISTORYWilli Spavetti (CH)
1979 : Mugello 6 Hours - 2nd in class : Dijon 6 Hours - 2nd in class : Brands Hatch 6 Hours - 1st in class
18 March 1979 - Mugello 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 61 | Porsche 911 Carrera RSR | GT | Willi Spavetti (CH)/Enzo Calderari (CH) | Ecurie Biennoise | 6th | 2nd | 15th | 120 laps |
22 April 1979 - Dijon 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 46 | Porsche 911 Carrera RSR | GT | Enzo Calderari (CH)/Willi Spavetti (CH)/Athos Severi (CH) | Ecurie Biennoise | 10th | 2nd | 22nd | 222 laps |
3 June 1979 - Nürburgring 1000 km - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 42 | Porsche 934 | 930 670 0178 | GT | Angelo Pallavicini (CH)/Enzo Calderari (CH)/Willi Spavetti (CH) | Ecurie Biennoise (CH) | DNF | 27th | 15 laps - Engine |
5 August 1979 - Brands Hatch 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 18 | Porsche 911 Carrera RSR | GT | Willi Spavetti (CH)/Enzo Calderari (CH)/Rolf Maritz (CH) | Ecurie Biennoise | 8th | 1st | 17th | 209 laps |