| 1988 · 1000 km Spa | 17 | 178 | 1. C2 | Descartes Louis | Gérard Tremblay · David Mercer · Louis Descartes · DNS - Del Bennett | ALD 03 BMW | — | 113 | WSPR historical record |
| 1986 · 1986 24 Hours of Le Mans | 11 | 90 | Gr.C2 | Jens Winther Denmark (private entrant) | David MercerJens Winther David Mercer Lars Viggo Jensen | URD C83 | BMW M88 3.5L S6 | 310 | Wikipedia contributors · CC BY-SA 4.0 |
| 1986 · Kouros' 1000 km Silverstone | 18 | 90 | 4. C2 | Jens Winther Denmark | Jens Winther · David Mercer | URD C83 BMW | — | 177 | WSPR historical record |
| 1986 · Shell Gemini 1000 km Brands Hatch | 12 | 90 | 4. C2 | Jens Winther Denmark | David Mercer · Jens Winther | URD C83 BMW | — | 195 | WSPR historical record |
| 1986 · ADAC Kouros 1000 km Nürburgring | retired | 72 | C2 | John Bartlett Racing with G | Kenneth Leim · David Mercer | Bardon DB1 Ford | — | 60 | WSPR historical record |
| 1986 · Kouros 1000 Kilometres Spa | 19 | 72 | 5. C2 | John Bartlett Racing with G | David Mercer · Kenneth Leim · Ian Khan | Bardon DB1 Ford | — | 112 | WSPR historical record |
| 1985 · 1985 24 Hours of Le Mans | DNF | 90 | Gr.C2 | Jens Winther Denmark (private entrant) | David MercerJens Winther David Mercer Margie Smith-Haas | URD C83 | BMW M88 3.5L S6 | 141 | Wikipedia contributors · CC BY-SA 4.0 |
| 1985 · Trofeo Filippo Caracciolo, Monza | 12 | 90 | 3. C2 | Jens Winther Denmark | Jens Winther · David Mercer | URD C83 BMW | — | 112 | WSPR historical record |
| 1985 · Silverstone 1000 Kilometres | retired | 90 | C2 | Jens Winther | Jens Winther · David Mercer | URD C83 BMW | — | 75 | WSPR historical record |
| 1985 · Duschfrish ADAC 1000 Kilometres, Hockenheim | 14 | 90 | C2 | Jens Winther Denmark | Jens Winther · David Mercer · Martin Birrane | URD C83 BMW | — | 118 | WSPR historical record |
| 1985 · 1000 km Spa | 13 | 90 | 3. C2 | Jens Winther Denmark | Jens Winther · David Mercer | URD C83 BMW | — | 108 | WSPR historical record |
| 1985 · 1000 km Brands Hatch | retired | 90 | C2 | Jens Winther Denmark | Jens Winther · David Mercer | URD C83 BMW | — | 121 | WSPR historical record |
| 1984 · 1984 24 Hours of Le Mans | DNF | 101 | Gr.B | Jens Winther Team Castrol | David MercerJens Winther David Mercer Lars-Viggo Jensen | BMW M1 | BMW M88 3.5L S6 | 96 | Wikipedia contributors · CC BY-SA 4.0 |
| 1984 · Grand Prix International 1000 Kilometres, Silverstone | retired | 101 | B | Jens Winther | Jens Winther · David Mercer · Winther jr. | BMW M1 | — | 6 | WSPR historical record |
| 1984 · ADAC 1000 Kilometres, Nürburgring | source_section_other_starters | 101 | B | Jens Winther | Jens Winther · David Mercer · Lars Viggo - Jensen | BMW M1 | — | | WSPR historical record |
| 1984 · British Aerospace 1000 Kilometres, Brands Hatch | 12 | 101 | 1. B | Jens Winther | Jens Winther · David Mercer · Lars Viggo - Jensen | BMW M1 | — | 191 | WSPR historical record |
| 1984 · Rothmans Spa 1000 Kilometres, Spa | 12 | 101 | 1. B | Jens Winther | Jens Winther · David Mercer · Lars Viggo - Jensen | BMW M1 | — | 121 | WSPR historical record |
| 1983 · Grand Prix International 1000 Kilometres, Silverstone | 10 | 89 | 1. B | Jens Winther | Jens Winther · David Mercer · Wolfgang Braun | BMW M1 | — | 169 | WSPR historical record |
| 1983 · Trophee Diners Club 1000 Kilometres, Spa-Francorchamps | 12 | 89 | 1. B | Jens Winther | Jens Winther · David Mercer · Frank Jelinski | BMW M1 | — | 118 | WSPR historical record |
| 1982 · The Pace Petroleum 6 Hours, Silverstone | not_classified | 59 | Gr.6 | David Mercer | David Mercer · Mike Chittenden · Barrie Williams | Vogue SP2 Ford | — | 167 | WSPR historical record |
| 1982 · Rudolf Caracciola Wanderpreis 1000 Kilometres, Nürburgring | not_classified | 46 | Gr.6 | David Mercer | David Mercer · Mike Chittenden | Vogue SP2 Ford | — | 27 | WSPR historical record |
| 1982 · Trophee Diners Club 1000 kilometres, Spa-Francorchamps | 12 | 56 | 3. Gr.6 | David Mercer | David Mercer · Mike Chittenden | Vogue SP2 Ford | — | 125 | WSPR historical record |
| 1982 · Shell Oils 1000 Kilometres, Brands Hatch | retired | 30 | Gr.6 | David Mercer | David Mercer · Mike Chittenden | Vogue SP2 Ford | — | 84 | WSPR historical record |
| 1981 · Flying Tigers 1000, Brands Hatch | 11 | 15 | 3. S2.0 | David Mercer | David Mercer · Mike Chittenden | Vogue SP2 Ford | — | 212 | WSPR historical record |
| 1981 · Silverstone 6 Hours | retired | 55 | S2.0 | David Mercer | David Mercer · Mike Chittenden | Vogue SP2 Ford | — | 2 | WSPR historical record |
| 1981 · 1000 km Nürburgring | 46 | 50 | 5. S2.0 | David Mercer | Mike Chittenden · David Mercer | Vogue SP2 Ford | — | 12 | WSPR historical record |
| 1980 · Dijon 1000 | retired | 41 | S2.0 | David Mercer | David Mercer · Mike Chittenden | Vogue SP2 Ford | — | 118 | WSPR historical record |
| 1980 · Brands Hatch 6 Hours | not_classified | 6 | 2. S2.0 | David Mercer | David Mercer · Richard Jenvey | Vogue SP2 Ford | — | 101 | WSPR historical record |
| 1980 · Silverstone 1000 | retired | 43 | S2.0 | David Mercer | David Mercer · Mike Chittenden · Richard Jones | Vogue SP2 Ford | — | 35 | WSPR historical record |
| 1980 · Nürburgring 1000 Kilometres | entry_only | 52 | S2.0 | — | David Mercer · Mike Chittenden | Vogue SP2 Ford | — | | WSPR historical record |
| 1979 · Dijon 6 Hours | retired | 22 | Gr.5 | Richard Jenvey | Richard Jenvey · David Mercer · Mike Chittenden | Lotus Esprit S1 | — | 24 | WSPR historical record |
| 1979 · Rivet Supply 6 Hours, Silverstone | retired | 49 | Gr.5 | Morfe Racing with Polaroof | David Mercer · Richard Jenvey | Lotus Esprit S1 | — | 6 | WSPR historical record |
| 1979 · 25th 1000 km Nürburgring | did_not_qualify | 26 | Gr.5 | Richard Jenvey | Richard Jenvey · David Mercer · Mike Chittenden | Lotus Esprit S1 | — | | WSPR historical record |
| 1979 · Rivet Suply 6 hours, Brands Hatch | not_classified | 37 | Gr.5 | Richard Jenvey | Richard Jenvey · David Mercer · Mike Chittenden | Lotus Esprit S1 | — | 69 | WSPR historical record |
| 1977 · Rivet Supply 6 Hours, Brands Hatch | 15 | 31 | 0. Gr.5 | Chaminot | Mike Chittenden · David Mercer · DNS - Fred Taylor | Lotus Elan | — | 84 | WSPR historical record |