| 6.2.1966 | 24 h Daytona | 12 | E-type | Hull / Byrne / Kingham | Jaguar of Florida | DNF |
| 6.2.1966 | 24 h Daytona | 58 | E-type | Baggely / Robson / Buchman / Buchman | Richard Robson | DNA |
| 6.3.1966 | BRSCC Brands Hatch [Marque] | | E-type | Terry Crawford | T. A. Crawford | 2nd |
| 6.3.1966 | BRSCC Brands Hatch [Marque] | | E-type | Jack Hayden | | raced |
| 6.3.1966 | BRSCC Brands Hatch [Marque] | | E-type | Tony Knight | A. H. Knight | 1st |
| 13.3.1966 | ICNSCC Delta Park [AIP+BIP+CIP+DIP+EIP] | | E-type | Stan Glaros | | raced |
| 26.3.1966 | 12 h Sebring | 31 | E-type | Hull / Kingham | Jaguar Cars of Winter Haven | DNS |
| 26.3.1966 | 12 h Sebring | 32 | E-type | Rodgers / Buchman / Robson | Richard B. Robson | 30th |
| 26.3.1966 | SCCA National Seguin [AP+BP+CP+DP] | | XK120 | Russ Simon | | ?th |
| 3.4.1966 | SCCA National Marlboro [CP+DP] | 27 | XK120 | Frank Baldwin | | DNA |
| 3.4.1966 | SCCA Regional Kirker Creek [AP+BP+CP] | 36 | E-type | R. M. Bennett | | 9th |
| 3.4.1966 | SCCA National Marlboro [AP+BP] | 39 | E-type | Dudley Smolen | | DNA |
| 3.4.1966 | SCCA Regional Kirker Creek [CM+DM+EM+FM+GM+DP] | 78 | XK120 | Paul Hammer | | DNA |
| 9.4.1966 | BRSCC Oulton Park [S/GT] | 28 | E-type Lightweight | Charles Bridges | Red Rose Motors (Chester) Ltd. | 1st |
| 9.4.1966 | BRSCC Oulton Park [GT] | 28 | E-type Lightweight | Charles Bridges | Red Rose Motors (Chester) Ltd. | 1st |
| 9.4.1966 | BRSCC Oulton Park [S/GT] | 29 | E-type | John Scott-Davies | Aintree Circuit Racing Team | DNF |
| 9.4.1966 | BRSCC Oulton Park [S/GT] | 30 | E-type | George Humble | George Humble | 4th |
| 9.4.1966 | BRSCC Oulton Park [GT] | 30 | E-type | George Humble | George Humble | 6th |
| 9.4.1966 | BRSCC Oulton Park [GT] | 33 | E-type Lightweight | Bob Vincent | Bob Vincent | raced |
| 9.4.1966 | BRSCC Oulton Park [S/GT] | 33 | E-type Lightweight | Bob Vincent | Bob Vincent | DNF |
| 9.4.1966 | BRSCC Oulton Park [S/GT] | 35 | E-type | Brian Redman | Brian Redman | 2nd |
| 9.4.1966 | BRSCC Oulton Park [GT] | 35 | E-type | Brian Redman | Brian Redman | 2nd |
| 11.4.1966 | BRSCC Mallory Park [Marque] | 162 | E-type | John Harris | G. Rimell | 2nd |
| 11.4.1966 | BRSCC Mallory Park [Marque] | 163 | E-type | John Harper | J. Harper | raced |
| 11.4.1966 | BRSCC Mallory Park [Marque] | 164 | E-type | C. J, Hayden | C. J. Hayden | 1st |
| 11.4.1966 | BRSCC Mallory Park [Marque] | 165 | XK120 | Craig Hinton | E. H. G. Hinton | ?th |
| 16.4.1966 | LCCC Oulton Park [Sports/GT] | 26 | E-type | Henryk Synowiec | Henryk Synowiec | DNA |
| 16.4.1966 | LCCC Oulton Park [Sports/GT] | 145 | E-type Lightweight | Bob Vincent | Bob Vincent | DNA |
| 16.4.1966 | LCCC Oulton Park [Formula Libre] | 146 | E-type | Charles Bridges | Red Rose Motors (Chester) Ltd. | 3rd |
| 16.4.1966 | LCCC Oulton Park [Sports/GT] | 146 | E-type | Charles Bridges | Red Rose Motors (Chester) Ltd. | 1st |
| 16.4.1966 | LCCC Oulton Park [Sports/GT] | 147 | E-type | John Scott-Davies | Aintree Circuit Racing Team | DNA |
| 16.4.1966 | LCCC Oulton Park [Sports/GT] | 148? | E-type | Brian Redman | Red Rose Motors (Chester) Ltd. | DNS |
| 16.4.1966 | LCCC Oulton Park [Sports/GT] | 149 | E-type | George Humble | George Humble | 6th |
| 24.4.1966 | BARC Brands Hatch [Marque] | 119 | E-type | John Harris | G. Rimmell | ?th |
| 24.4.1966 | BARC Brands Hatch [Marque] | 120 | E-type | John Quick | J. Quick | 1st |
| 24.4.1966 | BARC Brands Hatch [Handicap] | 120 | E-type | John Quick | J. Quick | raced |
| 24.4.1966 | BARC Brands Hatch [Handicap] | 121 | E-type | Edward Nelson | E. S. Nelson | raced |
| 24.4.1966 | BARC Brands Hatch [Marque] | 121 | E-type | Edward Nelson | E. S. Nelson | DNA |
| 24.4.1966 | BARC Brands Hatch [Marque] | 122 | E-type | Tony Knight | A. H. Knight | 2nd |
| 30.4.1966 | SCCA Regional Thompson [Main] | | XK120 | Frank Baldwin | | ?th |
| 1.5.1966 | SCCA National Virginia [AP+BP] | 39 | E-type | Dudley Smolen | | 8th |
| 3.5.1966 | GP Japan | 19 | E-type | Ginji Yasuda | Ginji Yasuda | 5th |
| 3.5.1966 | GP Japan | 20 | E-type | Seiichiro Yokoyama | Seiichiro Yokoyama | 6th |
| 7.5.1966 | 750 MC Silverstone [S+1.4] | 3 | XK120 | Anthony Archer | A. B. Archer | raced |
| 7.5.1966 | 750 MC Silverstone [S+1.4] | 22 | E-type | John Bailey | J. Bailey | DNA |
| 7.5.1966 | 750 MC Silverstone [S+1.4] | 25 | XK120 | D. L. Robertson | D. L. Robertson | raced |
| 7.5.1966 | 750 MC Silverstone [S+1.4] | 36 | D-type | M. D. B. McGrath | M. D. B. McGrath | raced |
| 7.5.1966 | BARC Oulton Park [Handicap] | 38 | E-type | John Scott-Davies | Aintree Racing Team | DNF |
| 7.5.1966 | BARC Oulton Park [Special GT] | 38 | E-type | John Scott-Davies | Aintree Racing Team | 2nd |
| 7.5.1966 | BARC Oulton Park [Formula Libre] | 38 | E-type | Mike Drane | Aintree Racing Team | DNS |
| 7.5.1966 | BARC Oulton Park [Sports/Clubman] | 38 | E-type | Mike Drane | Aintree Racing Team | DNS |
| 7.5.1966 | BARC Oulton Park [Marque] | 38 | E-type | John Scott-Davies | Aintree Racing Team | DNA |
| 7.5.1966 | BARC Oulton Park [Marque] | 39 | E-type | John Quick | John Playford Ltd. | 2nd |
| 7.5.1966 | BARC Oulton Park [Handicap] | 39 | E-type | John Quick | John Playford Ltd. | 5th |
| 7.5.1966 | BARC Oulton Park [Special GT] | 40 | E-type | Rhoddy Harvey-Bailey | E. Nelson | 5th |
| 7.5.1966 | BARC Oulton Park [Marque] | 40 | E-type | Edward Nelson | E. Nelson | 5th |
| 7.5.1966 | BARC Oulton Park [Handicap] | 40 | E-type | Edward Nelson | E. Nelson | 6th |
| 7.5.1966 | BARC Oulton Park [Marque] | 41 | E-type | George Humble | George Humble | DNA |
| 7.5.1966 | BARC Oulton Park [Handicap] | 41 | E-type | George Humble | George Humble | DNA |
| 7.5.1966 | BARC Oulton Park [Marque] | 42 | E-type | Charles Bridges | Red Rose Motors (Chester) Ltd. | DNA |
| 7.5.1966 | BARC Oulton Park [Special GT] | 42 | E-type | Charles Bridges | Red Rose Motors (Chester) Ltd. | 1st |
| 7.5.1966 | BARC Oulton Park [Marque] | 43 | E-type Lightweight | Bob Vincent | Bob Vincent | DNA |
| 7.5.1966 | BARC Oulton Park [Special GT] | 43 | E-type Lightweight | Bob Vincent | Bob Vincent | 3rd |
| 8.5.1966 | 500 mile Brands Hatch | 8 | E-type | Oliver / Baker | D. R. Racing Division | DNF |
| 8.5.1966 | 500 mile Brands Hatch | 9 | E-type | Plumstead / Pearce | D. Plumstead | 6th |
| 8.5.1966 | 500 mile Brands Hatch | 10 | E-type | Merrick / Harper | M. C. D. Merrick | 19th |
| 8.5.1966 | SMRC Ingliston [S/Special GT+1.2] | 35 | XK120 | Bob Hamilton | R. Hamilton | DNA |
| 8.5.1966 | SCCA Regional Laguna Seca [AP+BP+CP+DP] | 36 | E-type | Robert Bennett | | DNA |
| 8.5.1966 | SCCA Regional Laguna Seca [AP+BP+CP+DP] | 78 | XK120 | Paul Hammer | | DNA |
| 15.5.1966 | SCCA National Cumberland [DP] | 15 | XK120 L | Janet Guthrie | Janet Guthrie | DNA |
| 15.5.1966 | SCCA National Cumberland [AP+BP+CP] | 39 | E-type | Dudley Smoke | Dudley Smoke | DNA |
| 15.5.1966 | Snetterton | | E-type | Charles Bridges | | 3rd |
| 22.5.1966 | 1000 km Spa | 48 | E-type | Harper / Merrick | Mike Merrick | 16th |
| 22.5.1966 | SM Monza | | E-type | Ernst Brem | | 8th |