| 1984 · 1984 24 Hours of Le Mans | DNF | 32 | Gr.C1 | Viscount Downe Racing (private entrant) Aston Martin Lagonda | John Sheldon · Mike Salmon · Richard AttwoodJohn Sheldon Mike Salmon Richard Attwood | Nimrod NRA/C2B | Aston Martin DP1229 5.3L V8 | 92 | Wikipedia contributors · CC BY-SA 4.0 |
| 1984 · Grand Prix International 1000 Kilometres, Silverstone | retired | 31 | C1 | Viscount Downe Racing with | Mike Salmon · John Sheldon · Richard Attwood | Nimrod NRA C2B Aston Ma | — | 103 | WSPR historical record |
| 1971 · 1971 24 Hours of Le Mans | 2 | 19 | S 5.0 | JW Automotive Engineering | Richard Attwood · Herbert MüllerRichard Attwood Herbert Müller | Porsche 917 K | Porsche 4.9L F12 | 395 | Wikipedia contributors · CC BY-SA 4.0 |
| 1971 · Austrian 1000 Kilometres, Zeltweg | 1 | 16 | 1. S5.0 | John Wyer Automotive | Pedro Rodriguez · Richard Attwood | Porsche 917K | — | 170 | WSPR historical record |
| 1971 · Austrian 1000 Kilometres, Zeltweg | source_section_running_in_practice | T | S5.0 | John Wyer Automotive | Derek Bell · Richard Attwood · Pedro Rodriguez | Porsche 917K | — | | WSPR historical record |
| 1971 · Watkins Glen 6 Hours | 3 | 2 | 2. S | John Wyer Automotive Engine | Derek Bell · Richard Attwood | Porsche 917K | — | 259 | WSPR historical record |
| 1971 · Watkins Glen 6 Hours | source_section_running_in_practice | T | S | John Wyer Automotive | Jo Siffert · Gijs van Lennep · Derek Bell · Richard Attwood | Porsche 917K | — | | WSPR historical record |
| 1971 · Targa Florio | 3 | 14 | 1. P2.0 | Scuderia Filipinetti | Jo Bonnier · Richard Attwood | Lola T212 Ford | — | 11 | WSPR historical record |
| 1970 · 1970 24 Hours of Le Mans | 1 | 23 | S 5.0 | Porsche Konstruktionen - Salzburg | Hans Herrmann · Richard AttwoodHans Herrmann Richard Attwood | Porsche 917 K | Porsche 4.5L F12 | 343 | Wikipedia contributors · CC BY-SA 4.0 |
| 1970 · Ausrian 1000 Kilometres, Zeltweg | 4 | 21 | 2. S5.0 | Porsche KG Salzburg | Vic Elford · Richard Attwood | Porsche 917K | — | 162 | WSPR historical record |
| 1970 · Ausrian 1000 Kilometres, Zeltweg | source_section_running_in_practice | T | S5.0 | Porsche KG Salzburg | Vic Elford · Richard Attwood · Kurt Ahrens, Jr. · Helmut Marko | Porsche 917K | — | | WSPR historical record |
| 1970 · Sebring 12 Hours | 7 | 46 | 5. P3.0 | Martini International | Gerhard Koch · Gérard Larrousse · Richard Attwood · DNS - Hans-Dieter Dechent | Porsche 908/02 | — | 236 | WSPR historical record |
| 1970 · Sebring 12 Hours | 68 | 45 | P3.0 | Martini International | Richard Attwood · Gérard Larrousse · DNS - Gerhard Koch | Porsche 908/02 | — | 31 | WSPR historical record |
| 1970 · BOAC 1000 Kilometres, Brands Hatch | 3 | 12 | 3. S5.0 | Porsche Salzburg | Richard Attwood · Hans Herrmann | Porsche 917K | — | 227 | WSPR historical record |
| 1970 · 1000 km Monza | retired | 9 | S5.0 | Porsche Salzburg | Hans Herrmann · Richard Attwood | Porsche 917K | — | 63 | WSPR historical record |
| 1970 · Targa Florio | 5 | 36 | 4. P3.0 | John Wyer Automotive Engine | Björn Waldegaard · Richard Attwood | Porsche 908/03 | — | 11 | WSPR historical record |
| 1970 · 1000 km Spa | 6 | 29 | 6. S5.0 | Porsche Salzburg | Richard Attwood · Hans Herrmann | Porsche 917K | — | 68 | WSPR historical record |
| 1970 · 1000 km Nürburgring | 2 | 15 | 2. P3.0 | Porsche Salzburg | Hans Herrmann · Richard Attwood | Porsche 908/03 | — | 44 | WSPR historical record |
| 1970 · Watkins Glen 6 Hours | 6 | 32 | 6. S5.0 | Porsche-Audi USA | Richard Attwood · Kurt Ahrens, Jr. · DNS - Denny Hulme | Porsche 917K | — | 295 | WSPR historical record |
| 1969 · 1969 24 Hours of Le Mans | DNF | 12 | S 5.0 | Porsche System Engineering | Vic Elford · Richard AttwoodVic Elford Richard Attwood | Porsche 917 LH | Porsche 4.5L F12 | 327 | Wikipedia contributors · CC BY-SA 4.0 |
| 1969 · 24 h Daytona | 24 | 53 | P3.0 | Porsche System Engineering | Udo Schütz · Gerhard Mitter · Richard Attwood | Porsche 908L | — | 483 | WSPR historical record |
| 1969 · 24 h Daytona | retired | 51 | P3.0 | Porsche System Engineering | Richard Attwood · Joe Buzzetta | Porsche 908L | — | 273 | WSPR historical record |
| 1969 · Austrian GP, 1000 km Zeltweg | 3 | 30 | 3. S5.0 | David Piper Racing | Richard Attwood · Brian Redman · DNS - Jo Siffert | Porsche 917K | — | 169 | WSPR historical record |
| 1969 · Austrian GP, 1000 km Zeltweg | source_section_running_in_practice | 4T | P3.0 | Porsche Salzburg | Jo Siffert · Richard Attwood | Porsche 908/02 | — | | WSPR historical record |
| 1969 · 12 h Sebring | 7 | 30 | 5. P3.0 | Porsche System Engineering | Vic Elford · Richard Attwood | Porsche 908/02 | — | 228 | WSPR historical record |
| 1969 · Brands Hatch, BOAC 500 miles | 2 | 55 | 2. P3.0 | Porsche System Engineering | Vic Elford · Richard Attwood | Porsche 908/02 | — | 225 | WSPR historical record |
| 1969 · 1000 km Monza | 16 | 6 | P3.0 | Porsche System Engineering | Vic Elford · Richard Attwood | Porsche 908 LH | — | 75 | WSPR historical record |
| 1969 · 53rd Targa Florio, Piccolo Madonie | 33 | 268 | P3.0 | Porsche System Engineering | Richard Attwood · Brian Redman | Porsche 908/02 | — | 7 | WSPR historical record |
| 1969 · ADAC 1000 kilometres Nürburgring | 4 | 6 | 4. P3.0 | Salzburg Porsche Konstrukti | Rudi Lins · Richard Attwood | Porsche 908/02 | — | 43 | WSPR historical record |
| 1969 · Watkins Glen 6 Hours, 22nd Annual Sports Car Weekend at Watkins Glen | 2 | 4 | 2. P3.0 | A. G. Dean Racing Ltd. | Vic Elford · Richard Attwood · DNS - Tony Dean | Porsche 908/02 | — | 291 | WSPR historical record |
| 1968 · 1968 24 Hours of Le Mans | 7 | 21 | S 5.0 | D. Piper (private entrant) | David Piper · Richard AttwoodDavid Piper Richard Attwood | Ferrari 250LM | Ferrari 3.3L V12 | 302 | Wikipedia contributors · CC BY-SA 4.0 |
| 1968 · BOAC 500, Brands Hatch | 20 | 42 | P2.0 | Autodelta SpA | Richard Attwood · Nino Vaccarella | Alfa Romeo T33/2 | — | 169 | WSPR historical record |
| 1968 · 1000 km Nürburgring | retired | 7 | P3.0 | Alan Mann Racing | Frank Gardner · Richard Attwood | Ford F3L-P68 | — | | WSPR historical record |
| 1968 · Watkins Glen 6 Hours | retired | 3 | P3.0 | Porsche System Engineering | Scooter Patrick · Richard Attwood · Joe Buzzetta · DNS - Jo Siffert · DNS - Tetsu Ikuzawa | Porsche 908 | — | 145 | WSPR historical record |
| 1968 · GP d'Autriche, 500 km Zeltweg | entry_only | 6 | P3.0 | Alan Mann | Richard Attwood · Frank Gardner | Ford F3L P68 | — | | WSPR historical record |
| 1967 · 1967 24 Hours of Le Mans | DNF | 23 | P 5.0 | Maranello Concessionaires | Richard Attwood · Piers CourageRichard Attwood Piers Courage | Ferrari 412 P | Ferrari 4.0L V12 | 208 | Wikipedia contributors · CC BY-SA 4.0 |
| 1967 · 24 h Daytona | retired | 31 | P+2.0 | David Piper | David Piper · Richard Attwood | Ferrari 365P2/3 | — | 311 | WSPR historical record |
| 1967 · BOAC 500 Brands Hatch | 7 | 9 | 7. P+2.0 | Maranello Concessionaires | Richard Attwood · David Piper | Ferrari 330P3/4 | — | 202 | WSPR historical record |
| 1967 · Sports Car Grand Prix Österreich, Zeltweg | 2 | 17 | 1. S2.0 | Midland Racing Partnership | William Bradley · Richard Attwood | Porsche 906 | — | 155 | WSPR historical record |
| 1967 · 12 h Sebring | 48 | 20 | P+2.0 | David Piper | David Piper · Richard Attwood | Ferrari 365P2/3 | — | 65 | WSPR historical record |
| 1967 · 1000 km Monza | entry_only | 8 | P+2.0 | David Piper | Lucien Bianchi · Richard Attwood | Ferrari 330P3 | — | | WSPR historical record |
| 1967 · 1000 km Spa | 3 | 10 | 2. P+2.0 | Maranello Concessionaires | Richard Attwood · Lucien Bianchi · DNS - Mike Parkes | Ferrari 330P3/4 | — | 70 | WSPR historical record |
| 1967 · 1000 km Nürburgring | retired | 6 | P+2.0 | John Wyer Automotive Engine | Jacky Ickx · Richard Attwood | Mirage M1 Ford | — | 29 | WSPR historical record |
| 1966 · 1966 24 Hours of Le Mans | DNF | 16 | P 5.0 | Maranello Concessionaires | Richard Attwood · David PiperRichard Attwood David Piper | Ferrari 365 P2 | Ferrari 4.4L V12 | 33 | Wikipedia contributors · CC BY-SA 4.0 |
| 1966 · 24 h Daytona | 15 | 27 | 8. P+2.0 | David Piper | David Piper · Richard Attwood | Ferrari 250LM | — | 556 | WSPR historical record |
| 1966 · 1000 km Monza | 13 | 38 | 6. P2.0 | Maranello Concessionaires | Richard Attwood · David Piper | Ferrari Dino 206S | — | 90 | WSPR historical record |
| 1966 · 1000 km Spa | 6 | 12 | 1. P2.0 | Maranello Concessionaires | Richard Attwood · Jean Guichet | Ferrari Dino 206S | — | 67 | WSPR historical record |
| 1966 · ADAC - 1000 km Nürburgring | retired | 14 | P2.0 | Maranello Concessionaires | Richard Attwood · David Piper | Ferrari Dino 206S | — | 27 | WSPR historical record |
| 1965 · Reims 12 Hours | 4 | 8 | P+3.0 | David Piper Auto Racing Tea | David Piper · Richard Attwood | Ferrari 250LM | — | 274 | WSPR historical record |
| 1965 · XI. Int. ADAC 1000 Kilometers Rennen Nürburgring | retired | 10 | P+3.0 | Ford Advanced Vehicles Ltd. | Richard Attwood · John Whitmore | Ford GT40 Roadster | — | 34 | WSPR historical record |
| 1964 · 1964 24 Hours of Le Mans | DNF | 12 | P 5.0 | Ford Motor Company | Richard Attwood · Jo SchlesserRichard Attwood Jo Schlesser | Ford GT40 Mk.I | Ford 4.2L V8 | 58 | Wikipedia contributors · CC BY-SA 4.0 |
| 1964 · Grand Prix Reims 12 Hours | retired | 6 | P+3.0 | Ford Motor Co. | Richard Attwood · Jo Schlesser | Ford GT40 | — | | WSPR historical record |
| 1964 · 1000 km Nürburgring | 23 | 99 | 1. GT+3.0 | Shelby American Inc. | Jo Schlesser · Richard Attwood | Shelby Cobra | — | 39 | WSPR historical record |
| 1963 · 1963 24 Hours of Le Mans | DNF | 6 | P +3.0 | Lola Cars Ltd. | David Hobbs · Richard AttwoodDavid Hobbs Richard Attwood | Lola Mk6 GT | Ford 4.7L V8 | 151 | Wikipedia contributors · CC BY-SA 4.0 |
| 1962 · VIII. Int. ADAC 1000 km Nürburgring | retired | 10 | P2.0 | David Hobbs | David Hobbs · Richard Attwood | Lotus Elite | — | 27 | WSPR historical record |