PORSCHE RACING HISTORYJochen Mass (B)
1981 : Nürburgring 1000 Km - 2nd overall, 1st in class : Le Mans 24 Hours - 2nd in class : Kyalami 9 Hours - 1st overall
1 February 1981 - Daytona 24 Hours - World Championship for Drivers and Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 6 | Porsche 935 J | 000 00012 | GTX | Volkert Merl (D)/Jochen Mass (B) | Joest Racing (D) | 59th | 20th | 3rd | 59 laps - Accident |
26 April 1981 - Riverside 6 Hours - World Championship for Drivers and Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 30 | Porsche 935/81 | JR-001 | GTX | Gianpiero Moretti (I)/Jochen Mass (B) | Momo/Penthouse (I) | 14th | 9th | 5th | 172 laps |
10 May 1981 - Silverstone 6 Hours - World Championship for Drivers and Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 5 | Porsche 908/80 Turbo | 936-004 | S+2.0 | Jochen Mass (B)/Reinhold Jöst (D)/Volkert Merl (D) | Reinhold Joest (D) | DNF | 1st | 0 laps - Accident |
24 May 1981 - Nürburgring 1000 Km - World Championship for Drivers and Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 1 | Porsche 908/80 Turbo | 936-004 | S+2.0 | Jochen Mass (B)/Reinhold Jöst (D) | Joest Racing (D) | 2nd | 1st | 2nd | 17 laps |
14 June 1981 - Le Mans 24 Hours - World Championship for Drivers and Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 12 | Porsche 936/81 | 936-001 | S+2.0 | Jochen Mass (B)/Vern Schuppan (AUS)/Hurley Haywood (USA) | Porsche System (D) | 12th | 2nd | 2nd | 313 laps |
6 November 1981 - Kyalami 9 Hours - Non Championship Race
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 1 | Porsche 936 | 936-004 | Cat.1 | Jochen Mass (B)/Reinhold Jöst (D) | Lindsay Sakers (D) | 1st | 1st | 1st | 365 laps |