| 1990 · 1990 24 Hours of Le Mans | 11 | 44 | Gr.C1 | Italya Sports Richard Lloyd Racing | John Watson · Bruno Giacomelli · Allen BergJohn Watson Bruno Giacomelli Allen Berg | Porsche 962C | Porsche 935/82 3.0L F6 twin turbo | 335 | Wikipedia contributors · CC BY-SA 4.0 |
| 1990 · FIA WSPC - British Empire Trophy, Silverstone | 12 | 36 | | Toyota Team Tom's | Geoff Lees · John Watson | Toyota 90C-V | — | 95 | WSPR historical record |
| 1990 · FIA WSPC - Coupes de Spa, Spa Francorchamps | 18 | 36 | | Toyota Team Tom's | Johnny Dumfries · John Watson | Toyota 89C-V | — | 63 | WSPR historical record |
| 1990 · FIA WSPC, Dijon-Prenios | retired | 37 | | Toyota Team Tom's | Geoff Lees · John Watson | Toyota 89C-V | — | 9 | WSPR historical record |
| 1990 · FIA WSPC - Shell Donington Trophy | retired | 37 | | Toyota Team Tom's | Geoff Lees · John Watson | Toyota 89C-V | — | 112 | WSPR historical record |
| 1990 · FIA WSPC Mondial Players Ltd., Montreal | source_section_running_in_practice | 37T | | Toyota Team Tom's | Geoff Lees · John Watson | Toyota 90C-V | — | | WSPR historical record |
| 1990 · FIA WSPC Mondial Players Ltd., Montreal | 7 | 37 | | Toyota Team Tom's | Geoff Lees · John Watson | Toyota 89C-V | — | 60 | WSPR historical record |
| 1990 · FIA WSPC - Trofeo Hermanos Rodriguez, Mexico | retired | 37 | | Toyota Team Tom's | Geoff Lees · John Watson | Toyota 89C-V | — | 15 | WSPR historical record |
| 1989 · 1989 24 Hours of Le Mans | DNF | 37 | Gr.C1 | Toyota Team Tom's | Geoff Lees · Johnny, Earl Dumfries · John WatsonGeoff Lees Johnny, Earl Dumfries John Watson | Toyota 89C-V | Toyota R32V 3.2L V8 twin turbo | 58 | Wikipedia contributors · CC BY-SA 4.0 |
| 1989 · Brands Hatch Trophy | retired | 37 | C1 | Toyota Team Tom's | Johnny Dumfries · John Watson | Toyota 89C-V | — | 109 | WSPR historical record |
| 1989 · Wheatcroft Gold Cup, Donington | 10 | 37 | 0. C1 | Toyota Team Tom's | Johnny Dumfries · John Watson | Toyota 89C-V | — | 116 | WSPR historical record |
| 1989 · Trofeo Hermanos Rodriguez, Ciudad de Mexico, Mexico | retired | 37 | C1 | Toyota Team Tom's | Johnny Dumfries · John Watson | Toyota 89C-V | — | 66 | WSPR historical record |
| 1988 · 1988 24 Hours of Le Mans | DNF | 3 | Gr.C1 | Silk Cut Jaguar | Henri Pescarolo · John Watson · Raul BoeselHenri Pescarolo John Watson Raul Boesel | Jaguar XJR-9LM | Jaguar 7.0L V12 | 129 | Wikipedia contributors · CC BY-SA 4.0 |
| 1988 · 800 km Jerez | 2 | 3 | C1 | Silk Cut Jaguar | John Nielsen · John Watson · Andy Wallace | Jaguar XJR-9 | — | 190 | WSPR historical record |
| 1988 · 360 km Jarama | 3 | 3 | 3. C1 | Silk Cut Jaguar | John Nielsen · John Watson | Jaguar XJR-8/88 | — | 107 | WSPR historical record |
| 1988 · Autosport 1000 Kilometres, Silverstone | entry_only | - | C1 | Silk Cut Jaguar | John Watson · John Nielsen | Jaguar XJR-9 | — | | WSPR historical record |
| 1988 · 1000 km Brands Hatch | retired | 3 | C1 | Silk Cut Jaguar | John Watson · Davy Jones | Jaguar XJR-9 | — | 39 | WSPR historical record |
| 1987 · 1987 24 Hours of Le Mans | DNF | 5 | Gr.C1 | Silk Cut Jaguar | Jan LAMMERS · John Watson · Win PercyJan Lammers John Watson Win Percy | Jaguar XJR-8LM | Jaguar 7.0L V12 | 158 | Wikipedia contributors · CC BY-SA 4.0 |
| 1987 · Grand Premio Fortuna, Jarama | 1 | 5 | 1. C1 | Silk Cut Jaguar | Jan LAMMERS · John Watson | Jaguar XJR-8 | — | 109 | WSPR historical record |
| 1987 · Mount Fuji 1000 Kilometres | 1 | 5 | 1. C1 | Silk Cut Jaguar | Jan LAMMERS · John Watson | Jaguar XJR-8 | — | 224 | WSPR historical record |
| 1987 · 1000 km Jerez | retired | 5 | C1 | Silk Cut Jaguar | Jan LAMMERS · John Watson | Jaguar XJR-8 | — | 65 | WSPR historical record |
| 1987 · 1000 km Monza | 1 | 5 | 1. C1 | Silk Cut Jaguar | Jan LAMMERS · John Watson | Jaguar XJR-8 | — | 173 | WSPR historical record |
| 1987 · Autoglass 1000 Kilometres Silverstone | 2 | 5 | 2. C1 | Silk Cut Jaguar | Jan LAMMERS · John Watson | Jaguar XJR-8 | — | 210 | WSPR historical record |
| 1987 · 200 Meilen von Nürnberg - Int. ADAC-Norisring-Trophäe | retired | 5 | | Silk Cut Jaguar | Jan LAMMERS · John Watson | Jaguar XJR-8 | — | 42 | WSPR historical record |
| 1987 · Shell Gemini 1000 Kilometres Brands Hatch | 3 | 5 | 3. C1 | Silk Cut Jaguar | Jan LAMMERS · John Watson | Jaguar XJR-8 | — | 229 | WSPR historical record |
| 1987 · Int. ADAC-1000-km-Rennen, Nürburgring | retired | 5 | C1 | Silk Cut Jaguar | Jan LAMMERS · John Watson | Jaguar XJR-8 | — | 28 | WSPR historical record |
| 1987 · Kouros 1000 km Spa | 2 | 5 | 2. C1 | Silk Cut Jaguar | Jan LAMMERS · John Watson | Jaguar XJR-8 | — | 141 | WSPR historical record |
| 1985 · 1985 24 Hours of Le Mans | DNF | 3 | Gr.C1 | Rothmans Porsche | Al Holbert · Vern Schuppan · John WatsonAl Holbert Vern Schuppan John Watson | Porsche 962C | Porsche 935/76 2.6L F6 twin turbo | 299 | Wikipedia contributors · CC BY-SA 4.0 |
| 1984 · 1984 24 Hours of Le Mans | DNF | 40 | IMSA GTP | Group 44 Racing | Tony Adamowicz · John Watson · Claude Ballot-LénaTony Adamowicz John Watson Claude Ballot-Léna | Jaguar XJR-5 | Jaguar 6.0L V12 | 212 | Wikipedia contributors · CC BY-SA 4.0 |
| 1984 · Rothmans Spa 1000 Kilometres, Spa | 6 | 3 | 6. C1 | Rothmans Porsche | Vern Schuppan · John Watson | Porsche 956 | — | 139 | WSPR historical record |
| 1984 · 1000 Kilometres di Imola | retired | 1 | C1 | Rothmans Porsche | Jacky Ickx · John Watson | Porsche 956 PDK | — | 2 | WSPR historical record |
| 1984 · Mount Fuji 1000 Kilometres | 1 | 2 | 1. C1 | Rothmans Porsche | Stefan Bellof · John Watson | Porsche 956 | — | 226 | WSPR historical record |
| 1977 · 500 kms de I'ACF, Dijon-Prenois | retired | 2 | S3.0 | US Autodelta SpA | Vittorio Brambilla · John Watson | Alfa Romeo 33SC12 ASK | — | | WSPR historical record |
| 1975 · 1000 km Nürburgring | retired | 5 | S3.0 | Gelo Racing Team | John Watson · Tom Pryce | Mirage Gulf GR7 Ford | — | 27 | WSPR historical record |
| 1974 · 1000-km-Rennen Nürburgring | 15 | 21 | 3. S2.0 | Chevron Cars Ltd. | Peter Gethin · John Watson | Chevron B26 Hart | — | 28 | WSPR historical record |
| 1973 · 1973 24 Hours of Le Mans | DNF | 9 | S 3.0 | Gulf Research Racing | Mike Hailwood · John Watson · Vern SchuppanMike Hailwood John Watson Vern Schuppan | Mirage M6 | Cosworth DFV 3.0L V8 | 122 | Wikipedia contributors · CC BY-SA 4.0 |
| 1973 · 24 h Daytona | retired | 2 | S3.0 | Gulf Racing | Mike Hailwood · John Watson | Mirage M6 Ford | — | 366 | WSPR historical record |
| 1973 · Watkins Glen 6 Hours | 5 | 2 | 5. S3.0 | Gulf Research Racing | Mike Hailwood · John Watson · DNS - Derek Bell | Mirage M6 Ford | — | 179 | WSPR historical record |
| 1973 · Austrian 1000 Kilometres, Österreichring, Zeltweg | 4 | 6 | 4. S3.0 | Gulf Racing | Mike Hailwood · John Watson · DNS - Derek Bell | Mirage M6 Ford | — | 167 | WSPR historical record |
| 1972 · BOAC 1000 Kilometres, Brands Hatch | retired | 30 | S2.0 | Willie Tuckett | Andrew Fletcher · John Watson | Chevron B21 Ford | — | 62 | WSPR historical record |