| 2.4.1955 | British Empire Trophy | 52 | #XKC 021 | David Boston | D. Boston | DNQ |
| 9.4.1955 | Bristol MC & LCC Castle Combe [Sports] | 67 | #XKC 049 | Gil Tyrer | | 4th |
| 9.4.1955 | Bristol MC & LCC Castle Combe [Sports] | | | Dan Margulies | | 1st |
| 11.4.1955 | BRSCC Brands Hatch [Sports] | 43 | #XKC 049 | Gil Tyrer | | 6th |
| 12.4.1955 | Goodwood Easter [S+2.0] | 74 | #XKC 051 | Tony Rolt | Ecurie Ecosse | 4th |
| 12.4.1955 | Goodwood Easter [S+2.0] | 75 | #XKC 042 | Robin Carnegie | J. Keeling | 14th |
| 12.4.1955 | Goodwood Easter [S+2.0] | 76 | #XKC 052 | Peter Blond | P. Blond | 9th |
| 12.4.1955 | Goodwood Easter [S+2.0] | 77 | #XKC 038 | Dan Margulies | D. Margulies | 15th |
| 16.4.1955 | WJC Charterhall [Sports] | 36 | #XKC 053 | Ninian Sanderson | J. K. Hunter | 2nd |
| 16.4.1955 | WJC Charterhall [Racing] | 36 | #XKC 053 | Freddy Stang | J. K. Hunter | DNA |
| 16.4.1955 | WJC Charterhall [Sports] | 42 | #XKC 049 | Gil Tyrer | G. Tyrer | DNA |
| 16.4.1955 | WJC Charterhall [Racing] | 42 | #XKC 049 | Gil Tyrer | G. Tyrer | DNA |
| 16.4.1955 | WJC Charterhall [Sports] | 44 | | Dan Margulies | D. Margulies | raced |
| 16.4.1955 | WJC Charterhall [Racing] | 44 | | Dan Margulies | D. Margulies | raced |
| 17.4.1955 | Coupes de Paris | | #XKC 008 | John Hogg | | 18th |
| 17.4.1955 | Coupes de Paris | | #XKC 042 | John Keeling | | DNS |
| 30.4.1955 | NSMC Oulton Park [Sports Unlimited] | 48 | #XKC 021 | David Boston | David Boston | 3rd |
| 30.4.1955 | NSMC Oulton Park [Formula Libre] | 48 | #XKC 021 | David Boston | David Boston | 2nd |
| 30.4.1955 | NSMC Oulton Park [Handicap] | 48 | #XKC 021 | David Boston | David Boston | ?th |
| 30.4.1955 | NSMC Oulton Park [Handicap] | 51 | #XKC 049 | Gil Tyrer | Gillie Tyrer | DNA |
| 30.4.1955 | NSMC Oulton Park [Formula Libre] | 51 | #XKC 049 | Gil Tyrer | Gillie Tyrer | DNA |
| 30.4.1955 | NSMC Oulton Park [Sports Unlimited] | 51 | #XKC 049 | Gil Tyrer | Gillie Tyrer | DNA |
| 30.4.1955 | WH & DCC Ibsley [Formula Libre] | 131 | #XKC 042 | Robin Carnegie | | DNF |
| 30.4.1955 | WH & DCC Ibsley [S+1.5] | 131 | | Robin Carnegie | | DNA |
| 30.4.1955 | WH & DCC Ibsley [S+1.5] | 138 | | Peter Blond | | 3rd |
| 30.4.1955 | WH & DCC Ibsley [Formula Libre] | 138 | #XKC 052 | Peter Blond | D. Margulies | 5th |
| 30.4.1955 | WH & DCC Ibsley [S+1.5] | 139 | | Dan Margulies | | 6th |
| 30.4.1955 | WH & DCC Ibsley [Formula Libre] | 139 | #XKC 038 | Graham Hill | | 6th |
| 1.5.1955 | SCCA National Bakersfield [S+1.5] | 20 | #XKC 023 | Jack Douglas | Jack Douglas | 20th |
| 1.5.1955 | SCCA Regional Thompson [CM+DM] | 58 | #XKC 013 | Jack Crusoe | | 2nd |
| 1.5.1955 | Mille Miglia | 719 | | Graham / Sault | | DNF |
| 8.5.1955 | Eläintarhanajo | 2 | #XKC 044 | Curt Lincoln | | 2nd |
| 8.5.1955 | Eläintarhanajo [Production] | 14 | #XKC 044 | Curt Lincoln | | 1st |
| 8.5.1955 | GP Spa | 27 | #XKC 038 | Dan Margulies | | DNF |
| 8.5.1955 | GP Spa | 28 | #XKC 052 | Hans Davids | Peter Blond | 5th |
| 8.5.1955 | GP Spa | 36 | #XKC 043? | Sheid | | 11th |
| 13.5.1955 | Ulster Trophy | 4 | #XKC 051 | Bill Smith | William Smith | 2nd |
| 14.5.1955 | ADMC Crimond [Sports] | 33 | #XKC 053 | Jock Lawrence | J. K. Hunter | 1st |
| 15.5.1955 | GP Bari [S+2.0] | 12 | #XKC 038 | Dan Margulies | | 8th |
| 15.5.1955 | SCCA National Cumberland [CM+DM+EM] | 21 | | Russ Boss | R. Boss | DNA |
| 15.5.1955 | SCCA National Cumberland [CM+DM+EM] | 213 | | M. R. J. Wyllie | M. R. J. Wyllie | DNA |
| 15.5.1955 | Preliminary Cumberland [Ladies] | 213 | | Margaret Wyllie | Mrs. M. R. J. Wyllie | 2nd |
| 21.5.1955 | Trofeo Sardo | | | Dan Margulies | | 3rd |
| 28.5.1955 | SMRC Snetterton [Jaguars XK120 & C-type ] | 61 | #XKC 052 | Peter Blond | | 3rd |
| 28.5.1955 | SMRC Snetterton [Sports] | 61 | #XKC 052 | Peter Blond | | 5th |
| 28.5.1955 | SMRC Snetterton [Jaguars XK120 & C-type ] | 64 | #XKC 021 | David Boston | | 4th |
| 28.5.1955 | SMRC Snetterton [Jaguars XK120 & C-type ] | 66 | #XKC 051 | Bill Smith | | 1st |
| 28.5.1955 | SMRC Snetterton [Formula Libre] | 66 | #XKC 051 | Bill Smith | | 4th |
| 28.5.1955 | SMRC Snetterton [Sports] | 66 | #XKC 051 | Bill Smith | | 3rd |
| 28.5.1955 | SMRC Snetterton [Sports] | 70 | #XKC 053 | Jock Lawrence | J. K. Hunter | 4th |
| 28.5.1955 | SMRC Snetterton [Jaguars XK120 & C-type ] | 70 | #XKC 053 | Jock Lawrence | J. K. Hunter | 2nd |
| 29.5.1955 | GP des Frontières | 12 | #XKC 027 | Paul Vogel | Paul Vogel | DNF |
| 29.5.1955 | Eifelrennen Nürburgring | 15 | #XKC 038 | Dan Margulies | Dan Margulies | 17th |
| 29.5.1955 | National Zandvoort | 72 | | | | raced |
| 29.5.1955 | SCCA Regional Thompson [CM+DM] | 119 | #XKC 013 | Jack Crusoe | | 2nd |
| 29.5.1955 | Santa Barbara [S+1.5] | | #XKC 024 | Harrison Evans | | ?th |
| 30.5.1955 | Iowa [Ladies] | 12 | #XKC 030 | Virginia Katskee | Loyal Katskee | 2nd |
| 30.5.1955 | Iowa [BM+CM+DM+EM+CP+DP+EP] | 12 | #XKC 030 | Loyal Katskee | Loyal Katskee | 1st |
| 30.5.1955 | National Davidstow [Production] | 15 | #XKC 049 | Gil Tyrer | | 1st |
| 30.5.1955 | National Davidstow [Sports Unlimited] | 15 | #XKC 049 | Gil Tyrer | | 3rd |
| 30.5.1955 | National Davidstow [Formula Libre Handicap] | 15 | #XKC 049 | Gil Tyrer | | 2nd |
| 30.5.1955 | Whitsun Goodwood [S+2.0] | 57 | #XKC 005 | Michael Head | M. Head | 6th |
| 30.5.1955 | Whitsun Goodwood [Sports] | 57 | #XKC 005 | Michael Head | M. Head | DNS |
| 30.5.1955 | Whitsun Goodwood [Sports] | 58 | #XKC 021 | Dick Protheroe | D. S. Boston | raced |
| 30.5.1955 | Whitsun Goodwood [S+2.0] | 58 | #XKC 021 | Dick Protheroe | D. S. Boston | 3rd |
| 30.5.1955 | Whitsun Goodwood [S+2.0] | 59 | #XKC 052 | Peter Blond | P. Blond | 4th |
| 30.5.1955 | Whitsun Goodwood [Sports] | 59 | #XKC 052 | Peter Blond | P. Blond | 6th |
| 5.6.1955 | Santa Rosa [S+1.5] | 150 | #XKC 023 | Jack Douglas | | 11th |
| 18.6.1955 | BARC Goodwood [S3.5] | 39 | #XKC 052 | Peter Blond | | 4th |
| 18.6.1955 | Preliminary Hansen Dam [Modified +3.0] | 54 | #XKC 023 | Jack Douglas | Jack Douglas | DNA |
| 18.6.1955 | Preliminary Hansen Dam [Modified +3.0] | 130 | | Harrison Evans | Harrison Evans | DNA |
| 19.6.1955 | Hansen Dam [S+1.5] | 54 | #XKC 023 | Jack Douglas | Jack Douglas | DNA |
| 19.6.1955 | Hansen Dam [S+1.5] | 130 | #XKC 024 | Harrison Evans | Harrison Evans | 5th |
| 25.6.1955 | ECMC Snetterton [Handicap] | 32 | #XKC 051 | Bill Smith | William Smith | 3rd |
| 25.6.1955 | ECMC Snetterton [Handicap] | | #XKC 021 | Dick Protheroe | | 6th |
| 3.7.1955 | Milwaukee [BM+CM+DM+EM+CP+DP+EP] | 12 | #XKC 030 | Loyal Katskee | Loyal Katskee | 1st |
| 3.7.1955 | New Orleans [Sports] | 12 | | William R. Wilson | | 1st |
| 3.7.1955 | New Orleans [BM+CM+DM+EM+FM+CP+DP+EP] | 12 | | William R. Wilson | | DNA |
| 3.7.1955 | New Orleans [Handicap] | 12 | | William R. Wilson | | DNA |
| 4.7.1955 | Preliminary Beverly [BM+CM+DM+EM] | 37 | #XKC 013 | Jack Crusoe | | 11th |
| 4.7.1955 | SCCA National Beverly [BM+CM+DM+EM+CP] | 37 | #XKC 013 | Jack Crusoe | | DNF |
| 9.7.1955 | 6 h Relay Silverstone [Handicap] | | #XKC 021 | Dick Protheroe | Scratch Team | ?th |
| 9.7.1955 | Leinster Trophy | | #XKC 051 | Bill Smith | | DNF |
| 10.7.1955 | SCCA National Torrey Pines [S+1.5] | 18 | | Tom Groskritz | Tom Groskritz, Jr. | DNF |
| 10.7.1955 | WJC Charterhall [Racing Handicap] | 47 | #XKC 005 | John Barber | J. Barber | DNA |
| 10.7.1955 | WJC Charterhall [Sports Handicap] | 47 | #XKC 005 | Rosemary Vickers | Mrs. A. D. N. Vickers | raced |
| 10.7.1955 | SCCA National Torrey Pines [S+1.5] | 54 | #XKC 023 | Jack Douglas | Jack Douglas | 11th |
| 10.7.1955 | SCCA National Torrey Pines [S+1.5] | 70 | | Pete Woods | Pearce Woods | DNF |
| 24.7.1955 | 10 h Messina | | #XKC 038 | Margulies / Hill | Dan Margulies | DNF |
| 30.7.1955 | Crystal Palace International [Sports] | 83 | #XKC 021 | Boston / Protheroe | D. S. Boston | raced |
| 30.7.1955 | Crystal Palace International [Sports] | 84 | #XKC 052 | Peter Blond | P. Blond | 4th |
| 31.7.1955 | SCCA National Seafair [BM+CM+DM+EM] | 54 | #XKC 023 | Jack Douglas | Jack Douglas | 6th |
| 1.8.1955 | Brands Hatch International [S+1.9] | 47 | #XKC 021 | Boston / Protheroe | D. S. Boston | DNA |
| 1.8.1955 | Brands Hatch International [S+1.9] | 48 | #XKC 044 | Curt Lincoln | C. Lincoln | 3rd |
| 1.8.1955 | Brands Hatch International [S+1.9] | 49 | #XKC 005 | John Barber | Mrs. R. Vickers | DNF |
| 6.8.1955 | Charterhall International [Sports] | 74 | #XKC 005 | Rosemary Vickers | Mrs. A. D. N. Vickers | raced |
| 6.8.1955 | Charterhall International [Sports] | 75 | #XKC 053 | Jock Lawrence | J. K. Hunter | DNA |
| 6.8.1955 | Charterhall International [Sports] | 76 | #XKC 051 | Bill Smith | W. T. Smith | 5th |
| 6.8.1955 | Charterhall International [Sports] | 79 | #XKC 052 | Peter Blond | Peter Blond | DNA |
| 7.8.1955 | GP Sverige [Production/GT+2.0] | 23 | #XKC 044 | Curt Lincoln | Curt Lincoln | DNF |