| 14.6.1981 | 200 km Brainerd | 04 | 911 Carrera RSR | Rene Rodriguez | T & R Racing | unused |
| 14.6.1981 | 200 km Brainerd | 05 | 911 Carrera RSR | Tico Almeida | T & R Racing | unused |
| 14.6.1981 | Trans-Am Portland | 1 | 911 SC | John Bauer | Larry Green Racing | 3rd |
| 14.6.1981 | Trans-Am Portland | 14 | 924 Carrera GTR | Doc Bundy | Holbert Racing | 22nd |
| 14.6.1981 | Trans-Am Portland | 23 | 911 SC | Bob Zulkowski | Metal Craft Racing | 19th |
| 14.6.1981 | Trans-Am Portland | 27 | 911 SC | Karl Durkheimer | | 21st |
| 14.6.1981 | 24 h Le Mans | 44 | 935 M16 | Meister / Stommelen | Andial Meister Racing | DNA |
| 14.6.1981 | Trans-Am Portland | 54 | 911 SC | David Schroeder | Motor Sports International | 8th |
| 14.6.1981 | 24 h Le Mans | 56 | 935 | | Gelo Racing Team | DNA |
| 14.6.1981 | Trans-Am Portland | 56 | 911 Carrera SC | Rick Borlase | Rick Borlase | 37th |
| 14.6.1981 | 200 km Brainerd | 57 | 914/6 | Robert Overby | Personalized Autohaus | unused |
| 14.6.1981 | Trans-Am Portland | 57 | 930 | Monte Shelton | Porsche-Audi Northwest | 47th |
| 14.6.1981 | Trans-Am Portland | 58 | 911 SC | Neil Shelton | Porsche-Audi Northwest | 7th |
| 14.6.1981 | 24 h Le Mans | 58 | 935 K3/80 | Field / Ongais | Interscope-Kremer Racing | DNA |
| 14.6.1981 | 24 h Le Mans | 74 | 924 Carrera GTR | Bond / Brock / Richards | Porsche Cars Australia | DNQ |
| 14.6.1981 | 24 h Le Mans | | 935 K3 | | Charles Ivey Racing | DNA |
| 14.6.1981 | 24 h Le Mans | | 934 | Richard Cleare | Richard Cleare Racing | DNA |
| 14.6.1981 | 24 h Le Mans | | 935 K3/80 | Reine Wisell | John Fitzpatrick Racing | DNA |
| 14.6.1981 | 24 h Le Mans | | 908/3 Turbo | Siegfried Brunn | Siegfried Brunn | DNA |
| 21.6.1981 | DRM Wunstorf | 52 | 935 K4 | Bob Wollek | Jägermeister Kremer Racing | 5th |
| 21.6.1981 | DRM Wunstorf | 53 | 935 J | Dieter Schornstein | Vegla Racing Team | 4th |
| 21.6.1981 | DRM Wunstorf | 66 | 935 K3/81 | "John Winter" | Porsche Kremer Racing | 7th |
| 21.6.1981 | DRM Wunstorf | 80 | 911 SC | Peter Bulian | Peter Bulian | 9th |
| 28.6.1981 | Norisring Trophäe | 50 | 944 LM | Walter Röhrl | Porsche System Engineering | 11th |
| 28.6.1981 | DRM Norisring | 52 | 935 K4 | Bob Wollek | Jägermeister Kremer Racing | 6th |
| 28.6.1981 | Norisring Trophäe | 52 | 935 K4 | Bob Wollek | Jägermeister Kremer Racing | 1st |
| 28.6.1981 | Norisring Trophäe | 53 | 935 J | Harald Grohs | Vegla-Racing Team-Aachen | 4th |
| 28.6.1981 | DRM Norisring | 53 | 935 J | Dieter Schornstein | Vegla-Racing Team-Aachen | DNF |
| 28.6.1981 | Norisring Trophäe | 54 | 935 | | Gelo-Racing-Team | DNA |
| 28.6.1981 | Norisring Trophäe | 56 | 935 K3 | Jürgen Lässig | Wera-Meissberg-Team | raced |
| 28.6.1981 | DRM Norisring | 56 | 935 K3 | Jürgen Lässig | Wera-Meissberg-Team | DNS |
| 28.6.1981 | DRM Norisring | 59 | 935/77A | Franz Gschwender | Franz Gschwender | DNF |
| 28.6.1981 | Norisring Trophäe | 59 | 935/77A | Franz Gschwender | Franz Gschwender | 10th |
| 28.6.1981 | Norisring Trophäe | 60 | 935 K3/80 | John Fitzpatrick | T-Bird Swap Shop | 6th |
| 28.6.1981 | DRM Norisring | 60 | 935 K3/80 | John Fitzpatrick | T-Bird Swap Shop | 5th |
| 28.6.1981 | Norisring Trophäe | 61 | 935 K3 | | Porsche Kremer Racing | DNA |
| 28.6.1981 | DRM Norisring | 61 | 935 K3 | | Porsche Kremer Racing | DNA |
| 28.6.1981 | Norisring Trophäe | 62 | 935 K3/81 | "John Winter" | Porsche Kremer Racing | DNA |
| 28.6.1981 | DRM Norisring | 62 | 935 K3/81 | "John Winter" | Porsche Kremer Racing | DNF |
| 28.6.1981 | Norisring Trophäe | 64 | 935 | John Paul | J.L.P. Racing | DNA |
| 28.6.1981 | DRM Norisring | 64 | 935 | John Paul | J.L.P. Racing | DNA |
| 28.6.1981 | Norisring Trophäe | 66 | 935 J | Jochen Mass | Joest Racing | DNF |
| 28.6.1981 | DRM Norisring | 66 | 935 J | Jochen Mass | Joest-Racing | DNF |
| 28.6.1981 | DRM Norisring | 67 | 935 J | Volkert Merl | Spot-Oil-Racing | DNA |
| 28.6.1981 | Norisring Trophäe | 67 | 935 J | Volkert Merl | Spot-Oil Racing | DNA |
| 28.6.1981 | DRM Norisring | 68 | 935 | Wolf-Dieter Feuerlein | Valvoline Racing | DNA |
| 28.6.1981 | Norisring Trophäe | 68 | 935 | Wolf-Dieter Feuerlein | Valvoline Racing Hamburg | DNA |
| 28.6.1981 | DRM Norisring | 69 | 935 RSR | Urs Schweizer | Scuderia Basilea | 12th |
| 28.6.1981 | Norisring Trophäe | 70 | 935/78-81 | Gianpiero Moretti | Gianpiero Moretti | 5th |
| 28.6.1981 | DRM Norisring | 70 | 935/78-81 | Gianpiero Moretti | Gianpiero Moretti | 2nd |
| 28.6.1981 | DRM Norisring | 80 | 911 SC | Peter Bulian | Peter Bulian | DNF |
| 28.6.1981 | DRM Norisring | 83 | 930 | Bernd Schiller | Bernd Schiller | DNA |
| 28.6.1981 | 6 h Pergusa | | 935 | Guérin / Bussi / Delaunay | Christian Bussi | DNA |
| 28.6.1981 | CI Gr.2/4/5 Magione | | 935 | "Victor" | "Victor" | 5th |
| 28.6.1981 | 6 h Pergusa | | 934 | Dören / Pallavicini | Angelo Pallavicini | 4th |
| 28.6.1981 | 6 h Pergusa | | 924 Carrera GTR | Zbinden / Kofel | Formel Rennsport Club, Zurich | DNA |
| 4.7.1981 | 250 mile Daytona Paul Revere | 0 | 935 K3/80 | Field / Whittington | Interscope Racing | 7th |
| 4.7.1981 | 250 mile Daytona Paul Revere | 00 | 935 K3/80 | Bill Whittington | Interscope Racing | 33rd |
| 4.7.1981 | 250 mile Daytona Paul Revere | 01 | 911 S | Roehrig / White | | 13th |
| 4.7.1981 | 250 mile Daytona Paul Revere | 05 | 911 Carrera RSR | Tico Almeida | Tico Almeida | 36th |
| 4.7.1981 | Trans-Am Lime Rock | 1 | 911 SC | John Bauer | Larry Green Racing | 5th |
| 4.7.1981 | 250 mile Daytona Paul Revere | 9 | 935 K3/80 | Rahal / Garretson | Garretson Racing | 18th |
| 4.7.1981 | Trans-Am Lime Rock | 12 | 924 Carrera GTR | Al Holbert | Holbert Racing | 2nd |
| 4.7.1981 | Trans-Am Lime Rock | 14 | 924 Carrera GTR | Doc Bundy | Holbert Racing | 3rd |
| 4.7.1981 | 250 mile Daytona Paul Revere | 15 | 911 Carrera RSR 3.0 | Doug Lutz | D. L. Performance Engineering | 29th |
| 4.7.1981 | 250 mile Daytona Paul Revere | 18 | 935 JLP-3 | John Paul, Jr. | JLP Racing | 3rd |
| 4.7.1981 | 250 mile Daytona Paul Revere | 22 | 914/4 | Robert Overby | | 28th |
| 4.7.1981 | Trans-Am Lime Rock | 23 | 911 SC | Bob Zulkowski | Metal Craft Racing | 17th |
| 4.7.1981 | 250 mile Daytona Paul Revere | 24 | 934 | Ren Tilton | | 4th |
| 4.7.1981 | Trans-Am Lime Rock | 36 | 924 Carrera GTR | Paul Miller | Herman+Miller Porsche-Audi | 12th |
| 4.7.1981 | 250 mile Daytona Paul Revere | 38 | 911 | Ron Case | Ron Case | 12th |
| 4.7.1981 | 250 mile Daytona Paul Revere | 46 | 935 J | de Narváez / Haywood | DeNarvaez Enterprises | 1st |
| 4.7.1981 | Trans-Am Lime Rock | 58 | 911 SC | Monte Shelton | Porsche-Audi Northwest | 9th |
| 4.7.1981 | 250 mile Daytona Paul Revere | 84 | 935 M16 | "Jamsal" / Barrientos | Scorpio Racing | 23rd |
| 4.7.1981 | 250 mile Daytona Paul Revere | | 935 K3/80 | John Fitzpatrick | John Fitzpatrick Racing | DNS |
| 5.7.1981 | MN GT Donington | 8 | 924 Carrera GTR | Richard Lloyd | Canon Cameras Racing with GTi Engineering | DNA |
| 5.7.1981 | DRM Nürburgring GP Tourenwagen | 52 | 935 K4 | Bob Wollek | Jägermeister Kremer Racing | 1st |
| 5.7.1981 | DRM Nürburgring GP Tourenwagen | 53 | 935 J | Dieter Schornstein | Vegla Racing Team | 4th |
| 5.7.1981 | DRM Nürburgring GP Tourenwagen | 56 | 935 K3/81 | "John Winter" | Porsche Kremer Racing | 3rd |
| 5.7.1981 | Vila Real | 76 | 935 Aurora | Joaquim Moutinho | Team Miura / Ciprac | 9th |
| 5.7.1981 | DRM Nürburgring GP Tourenwagen | 80 | 911 SC | Peter Bulian | Peter Bulian | 10th |
| 5.7.1981 | Vila Real | 83 | 935 A4 | Robert Giannone | Robert Joseph Giannone | 1st |
| 5.7.1981 | Vila Real | 84 | 935 Aurora | Ruffino Fontes | Maconde | raced |
| 5.7.1981 | Vila Real | 85 | 935 K2 | Jorge Petiz | Venêncio - Ponto Verda | raced |
| 5.7.1981 | Vila Real | 86 | 911 S | Maurizio João Marques | Maurizio João Marques | DNA |
| 5.7.1981 | DRM Nürburgring GP Tourenwagen | | 930 | Matthias Lörper | | 11th |
| 5.7.1981 | Erding | | 935/77A | Franz Gschwender | Franz Gschwender | 2nd |
| 12.7.1981 | 6 h Watkins Glen | 7 | 935 | Heimrath / Heimrath, Jr. | Heimrath Racing | DNF |
| 12.7.1981 | 6 h Watkins Glen | 13 | 911 Carrera | Southard / Altman / Altman | Southard Motor Racing | 9th |
| 12.7.1981 | 6 h Watkins Glen | 18 | 935 JLP-3 | Paul, Jr. / Paul | J.L.P. Racing | DNF |
| 12.7.1981 | 6 h Watkins Glen | 21 | 914/6 | Aschenbrenner / Moennick | Alps Restoration, Inc. | DNF |
| 12.7.1981 | 6 h Watkins Glen | 23 | 911 | Lax / Lausberg | Stephen Lax Racing | DNF |
| 12.7.1981 | 6 h Watkins Glen | 26 | 911 Carrera RSR | Selby / Roe | Roe/Selby Racing | 10th |
| 12.7.1981 | 6 h Watkins Glen | 33 | 934 | Frank / Bartling | Toyota Village | DNF |
| 12.7.1981 | 6 h Watkins Glen | 36 | 924 Carrera GTR | Miller / Miller | Herman and Miller Porsche-Audi | DNF |
| 12.7.1981 | DRM Salzburgring | 52 | 935 K4 | Bob Wollek | Jägermeister Kremer-Racing | 2nd |
| 12.7.1981 | DRM Salzburgring | 59 | 935/77A | Franz Gschwender | Franz Gschwender | 5th |
| 12.7.1981 | 6 h Watkins Glen | 74 | 911 | Hulse / Speakman | | DNF |
| 12.7.1981 | 6 h Watkins Glen | 79 | 924 Carrera GTR | Winters / Bergstrom | Promotion Ltd./Whitehall Capital | DNF |
| 12.7.1981 | 6 h Watkins Glen | 86 | 935/80 | Haywood / Leven | Bayside Disposal Racing | DNF |