| 31.5.1981 | 200 mile Mid-Ohio | 00 | | | | DNA |
| 31.5.1981 | 200 mile Mid-Ohio | 07 | | Ludwig Heimrath, Jr. | | DNA |
| 31.5.1981 | 200 mile Mid-Ohio | 3 | #930 890 0013 | Rolf Stommelen | Andial Meister Racing | 30th |
| 31.5.1981 | 200 mile Mid-Ohio | 86 | #000 00024 | Leven / Haywood | Bayside Disposal Racing | 31st |
| 31.5.1981 | CI Gr.2/4/5 Vallelunga | | #930 770 0906 | Mussato | | 3rd |
| 31.5.1981 | Vallelunga | | #930 890 0017 | "Victor" | "Victor" | DNF |
| 7.6.1981 | SM Misano | | #000 00026 | Antoine Salamin | | ?th |
| 14.6.1981 | 200 km Brainerd | 07 | #930 770 0958 | Ludwig Heimrath, Jr. | Heimrath Racing | 28th |
| 14.6.1981 | 200 km Brainerd | 1 | #000 00011 | John Fitzpatrick | John Fitzpatrick | 2nd |
| 14.6.1981 | 200 km Brainerd | 18 | #JLP-3 | John Paul | John Paul | 3rd |
| 14.6.1981 | 200 km Brainerd | 30 | #JR-001 | Gianpiero Moretti | Momo/Penthouse | 22nd |
| 14.6.1981 | 24 h Le Mans | 40 | #930 890 0012 | DeNarvaez / Miller / Steckkönig | Joest Racing | DNF |
| 14.6.1981 | 24 h Le Mans | 41 | #000 0009 | Henn / Chandler / Mignot | Preston B. Henn | DNF |
| 14.6.1981 | 24 h Le Mans | 42 | #009 00030 | Verney / Kent-Cooke / Garretson | Cooke-Woods Racing | 6th |
| 14.6.1981 | 24 h Le Mans | 43 | #000 00013 | Miller / Siebert / Akin | Bob Akin Motor Racing | DNF |
| 14.6.1981 | 24 h Le Mans | 44 | #930 890 0013 | Meister / Stommelen | Andial Meister Racing | DNA |
| 14.6.1981 | 24 h Le Mans | 55 | #930 890 0022 | Cooper / Wood / Bourgoignie | Claude Bourgoignie | 4th |
| 14.6.1981 | 24 h Le Mans | 56 | | | Gelo Racing Team | DNA |
| 14.6.1981 | 24 h Le Mans | 57 | #930 890 0015 | Haldi / Poulain / Thatcher | Claude Haldi | DNF |
| 14.6.1981 | 24 h Le Mans | 58 | | Field / Ongais | Interscope-Kremer Racing | DNA |
| 14.6.1981 | 24 h Le Mans | 59 | #01 00020 | Field / Whittington / Whittington | Porsche Kremer Racing | DNF |
| 14.6.1981 | 24 h Le Mans | 60 | #000 00016 | Schornstein / Grohs / von Tschirnhaus | Vegla Racing Team | 10th |
| 14.6.1981 | 24 h Le Mans | 61 | #009 0003 | Dören / Holup / Lässig | Weralit Team | DNF |
| 14.6.1981 | 24 h Le Mans | 62 | #930 770 0912 | Guérin / "Segolen" / Bussi | "Segolen" | DNQ |
| 14.6.1981 | 24 h Le Mans | 69 | #935 L1 | Lundgardh / Wilds / Plankenhorn | Tuff-Kote Dinol Racing | DNF |
| 14.6.1981 | 200 km Brainerd | 86 | #000 00024 | Bruce Leven | Bayside Disposal Racing | 4th |
| 14.6.1981 | 24 h Le Mans | | | | Charles Ivey Racing | DNA |
| 14.6.1981 | CI Gr.2/4/5 Varano | | #930 770 0906 | Mussato | | 9th |
| 14.6.1981 | CI Gr.2/4/5 Varano | | #930 890 0017 | "Victor" | "Victor" | 2nd |
| 14.6.1981 | 24 h Le Mans | | #000 00011 | Reine Wisell | John Fitzpatrick Racing | DNA |
| 21.6.1981 | DRM Wunstorf | 52 | #K4/01 | Bob Wollek | Jägermeister Kremer Racing | 5th |
| 21.6.1981 | DRM Wunstorf | 53 | #000 00016 | Dieter Schornstein | Vegla Racing Team | 4th |
| 21.6.1981 | DRM Wunstorf | 66 | #01 00020 | "John Winter" | Porsche Kremer Racing | 7th |
| 28.6.1981 | Norisring Trophäe | 52 | #K4/01 | Bob Wollek | Jägermeister Kremer Racing | 1st |
| 28.6.1981 | DRM Norisring | 52 | #K4/01 | Bob Wollek | Jägermeister Kremer Racing | 6th |
| 28.6.1981 | DRM Norisring | 53 | #000 00016 | Dieter Schornstein | Vegla-Racing Team-Aachen | DNF |
| 28.6.1981 | Norisring Trophäe | 53 | #000 00016 | Harald Grohs | Vegla-Racing Team-Aachen | 4th |
| 28.6.1981 | Norisring Trophäe | 54 | | | Gelo-Racing-Team | DNA |
| 28.6.1981 | DRM Norisring | 56 | #009 0003 | Jürgen Lässig | Wera-Meissberg-Team | DNS |
| 28.6.1981 | Norisring Trophäe | 56 | #009 0003 | Jürgen Lässig | Wera-Meissberg-Team | raced |
| 28.6.1981 | Norisring Trophäe | 59 | #930 890 0011 | Franz Gschwender | Franz Gschwender | 10th |
| 28.6.1981 | DRM Norisring | 59 | #930 890 0011 | Franz Gschwender | Franz Gschwender | DNF |
| 28.6.1981 | DRM Norisring | 60 | #000 0009 | John Fitzpatrick | T-Bird Swap Shop | 5th |
| 28.6.1981 | Norisring Trophäe | 60 | #000 0009 | John Fitzpatrick | T-Bird Swap Shop | 6th |
| 28.6.1981 | DRM Norisring | 61 | | | Porsche Kremer Racing | DNA |
| 28.6.1981 | Norisring Trophäe | 61 | | | Porsche Kremer Racing | DNA |
| 28.6.1981 | DRM Norisring | 62 | #01 00020 | "John Winter" | Porsche Kremer Racing | DNF |
| 28.6.1981 | Norisring Trophäe | 62 | #01 00020 | "John Winter" | Porsche Kremer Racing | DNA |
| 28.6.1981 | Norisring Trophäe | 64 | | John Paul | J.L.P. Racing | DNA |
| 28.6.1981 | DRM Norisring | 64 | | John Paul | J.L.P. Racing | DNA |
| 28.6.1981 | Norisring Trophäe | 66 | #930 890 0012 | Jochen Mass | Joest Racing | DNF |
| 28.6.1981 | DRM Norisring | 66 | #930 890 0012 | Jochen Mass | Joest-Racing | DNF |
| 28.6.1981 | DRM Norisring | 67 | #009 0001 | Volkert Merl | Spot-Oil-Racing | DNA |
| 28.6.1981 | Norisring Trophäe | 67 | #009 0001 | Volkert Merl | Spot-Oil Racing | DNA |
| 28.6.1981 | Norisring Trophäe | 68 | | Wolf-Dieter Feuerlein | Valvoline Racing Hamburg | DNA |
| 28.6.1981 | DRM Norisring | 68 | | Wolf-Dieter Feuerlein | Valvoline Racing | DNA |
| 28.6.1981 | DRM Norisring | 69 | | Urs Schweizer | Scuderia Basilea | 12th |
| 28.6.1981 | DRM Norisring | 70 | #JR-001 | Gianpiero Moretti | Gianpiero Moretti | 2nd |
| 28.6.1981 | Norisring Trophäe | 70 | #JR-001 | Gianpiero Moretti | Gianpiero Moretti | 5th |
| 28.6.1981 | 6 h Pergusa | | #930 770 0912 | Guérin / Bussi / Delaunay | Christian Bussi | DNA |
| 28.6.1981 | CI Gr.2/4/5 Magione | | #930 890 0017 | "Victor" | "Victor" | 5th |
| 4.7.1981 | 250 mile Daytona Paul Revere | 0 | #000 00010 | Field / Whittington | Interscope Racing | 7th |
| 4.7.1981 | 250 mile Daytona Paul Revere | 00 | #000 00027 | Bill Whittington | Interscope Racing | 33rd |
| 4.7.1981 | 250 mile Daytona Paul Revere | 9 | #009 00030 | Rahal / Garretson | Garretson Racing | 18th |
| 4.7.1981 | 250 mile Daytona Paul Revere | 18 | #JLP-3 | John Paul, Jr. | JLP Racing | 3rd |
| 4.7.1981 | 250 mile Daytona Paul Revere | 46 | #000 00012 | DeNarvaez / Haywood | DeNarvaez Enterprises | 1st |
| 4.7.1981 | 250 mile Daytona Paul Revere | 84 | #930 670 0171 | "Jamsal" / Barrientos | Scorpio Racing | 23rd |
| 4.7.1981 | 250 mile Daytona Paul Revere | | | John Fitzpatrick | John Fitzpatrick Racing | DNS |
| 5.7.1981 | DRM Nürburgring GP Tourenwagen | 52 | #K4/01 | Bob Wollek | Jägermeister Kremer Racing | 1st |
| 5.7.1981 | DRM Nürburgring GP Tourenwagen | 53 | #000 00016 | Dieter Schornstein | Vegla Racing Team | 4th |
| 5.7.1981 | DRM Nürburgring GP Tourenwagen | 56 | #01 00020 | "John Winter" | Porsche Kremer Racing | 3rd |
| 5.7.1981 | Vila Real | 76 | | Joaquim Moutinho | Team Miura / Ciprac | 9th |
| 5.7.1981 | Vila Real | 83 | #911 460 9095 | Robert Giannone | Robert Joseph Giannone | 1st |
| 5.7.1981 | Vila Real | 84 | | Ruffino Fontes | Maconde | raced |
| 5.7.1981 | Vila Real | 85 | | Jorge Petiz | Venêncio - Ponto Verda | raced |
| 5.7.1981 | Erding | | #930 890 0011 | Franz Gschwender | Franz Gschwender | 2nd |
| 12.7.1981 | 6 h Watkins Glen | 0 | #000 00010 | Field / Whittington | Interscope IMSA Racing, Inc. | DNF |
| 12.7.1981 | 6 h Watkins Glen | 00 | | Field / Whittington | Interscope IMSA Racing, Inc. | unused |
| 12.7.1981 | 6 h Watkins Glen | 7 | #930 770 0958 | Heimrath / Heimrath, Jr. | Heimrath Racing | DNF |
| 12.7.1981 | 6 h Watkins Glen | 8 | #009 00043 | Paul, Jr. / Paul | J.L.P. Racing | unused |
| 12.7.1981 | 6 h Watkins Glen | 9 | #009 00030 | Mears / Garretson / Rutherford | Garretson Racing | 3rd |
| 12.7.1981 | 6 h Watkins Glen | 11 | #000 00011 | Fitzpatrick / Busby | John Fitzpatrick Racing | 4th |
| 12.7.1981 | 6 h Watkins Glen | 18 | #JLP-3 | Paul, Jr. / Paul | J.L.P. Racing | DNF |
| 12.7.1981 | 6 h Watkins Glen | 22 | #DMV 470 12CA=>930 770 0960° | Hinze / Whittington / Henn | Marty Hinze Racing | 5th |
| 12.7.1981 | 6 h Watkins Glen | 30 | #JR-001 | Moretti / Rahal | Momo Accessories, Inc. | 6th |
| 12.7.1981 | 6 h Watkins Glen | 43 | #000 00013 | Akin / Siebert / Candy | Bob Akin Motor Racing, Inc. | 8th |
| 12.7.1981 | DRM Salzburgring | 52 | #K4/01 | Bob Wollek | Jägermeister Kremer-Racing | 2nd |
| 12.7.1981 | DRM Salzburgring | 53 | #000 00016 | Dieter Schornstein | Vegla-Racing-Team | DNA |
| 12.7.1981 | DRM Salzburgring | 59 | #930 890 0011 | Franz Gschwender | Franz Gschwender | 5th |
| 12.7.1981 | DRM Salzburgring | 62 | #01 00020 | | Porsche Kremer-Racing | DNF |
| 12.7.1981 | 6 h Watkins Glen | 86 | #000 00028 | Haywood / Leven | Bayside Disposal Racing | DNF |
| 12.7.1981 | SM Hockenheim | | #000 00026 | Antoine Salamin | | ?th |
| 12.7.1981 | SM Hockenheim | | | Urs Schweizer | Scuderia Basilea | ?th |
| 26.7.1981 | 100 mile Sears Point | 0 | #000 00010 | Ted Field | Interscope Racing | 19th |
| 26.7.1981 | 100 mile Sears Point | 1 | #000 00011 | John Fitzpatrick | John Fitzpatrick Racing | 22nd |
| 26.7.1981 | 100 mile Sears Point | 9 | #009 00030 | Bobby Rahal | Garretson Racing | 18th |
| 26.7.1981 | 100 mile Sears Point | 12 | #009 00029 | Bruce Canepa | Bruce Canepa | 9th |
| 26.7.1981 | 100 mile Sears Point | 30 | #JR-001 | Gianpiero Moretti | Momo/Penthouse | 4th |
| 26.7.1981 | 100 mile Sears Point | 46 | #000 00012 | Mauricio DeNarvaez | DeNarvaez Enterprises | 5th |
| 26.7.1981 | 100 mile Sears Point | 86 | #000 00024 | Hurley Haywood | Bayside Disposal Racing | DNS |