| 20.9.1958 | GP Watkins Glen | 52 | C-type | Gordon MacKenzie | Gordon C. MacKenzie | 12th |
| 20.9.1958 | SCCA National Watkins Glen [BP+CP] | 96 | XK150 S | Patrick Pratt | Patrick D. Pratt | DNA |
| 20.9.1958 | SCCA National Watkins Glen [BP+CP] | 139 | XK150 S | Andrew Nicholas | | DNF |
| 20.9.1958 | SCCA National Watkins Glen [BP+CP] | 199 | XK150 S | Bob Grossman | Robert M. Grossman | 12th |
| 21.9.1958 | LISCA Lime Rock [CM+BP+CP] | 1 | Special | Gerry Georgi | | ?th |
| 21.9.1958 | GP Angola | 2 | XK120 | Dias Gomes | | 6th |
| 21.9.1958 | LISCA Lime Rock [CM+BP+CP] | 9 | | Jerry Schweitzer | | ?th |
| 21.9.1958 | GP Angola | 18 | D-type | Jimmy de Villiers | | 1st |
| 21.9.1958 | LISCA Lime Rock [CM+BP+CP] | 30 | XK140 MC | Bob Otten | | ?th |
| 21.9.1958 | Tour de France | 59 | Mark I 3.4 | Baillie / Jopp | | ?th |
| 21.9.1958 | Tour de France | 60 | Mark I 3.4 | Sopwith / Goldthorpe | | DNF |
| 21.9.1958 | Tour de France | 61 | Mark I 3.4 | Whitehead / Whitehead | | DNF |
| 21.9.1958 | LISCA Lime Rock [CM+BP+CP] | 135 | XK120 M | Bruce Boyle | | ?th |
| 21.9.1958 | Del Mar [BP+CP+DP+EP] | | XK120 M | Art Evans | | ?th |
| 21.9.1958 | Preliminary Galveston [CM+DM+EM+FM] | | C-type | Mason O'Keiff | | 4th |
| 21.9.1958 | USAC Marlboro | | D-type | Jack Ensley | | 12th |
| 21.9.1958 | SCCA Regional Galveston [BP+CP+DP+EP+FP+GP] | | XK150 Coupe | Gene Conant | | ?th |
| 21.9.1958 | Preliminary Galveston [BP+CP+DP+EP+GM] | | XK150 Coupe | Gene Conant | | ?th |
| 21.9.1958 | Tour de France | | Mark I 3.4 | Chavy / Le Guezec | | DNF |
| 21.9.1958 | Preliminary Galveston [BP+CP+DP+EP+GM] | | | Daniel Cavanaugh | | ?th |
| 27.9.1958 | Preliminary Gardena [Novice] | | | Jack Furcho | | 3rd |
| 27.9.1958 | Gardena [Main] | | XKSS | Bill Leyden | | DNA |
| 28.9.1958 | USAC Watkins Glen | 17 | D-type | Loyal Katskee | Jack Ensley | DNF |
| 28.9.1958 | WJC Charterhall [S+1.5] | 37 | XK120 | Robin Valentine | R. D. Valentine | raced |
| 28.9.1958 | WJC Charterhall [Racing] | 38 | D-type | Jim Clark | Border Reivers | 2nd |
| 28.9.1958 | ICNSCC Ellensburg [AP+BP+CP+DP+EP] | 38 | XK140 MC | Bob Goodfellow | | 17th |
| 28.9.1958 | WJC Charterhall [S+1.5] | 38 | D-type | Jim Clark | Border Reivers | 3rd |
| 28.9.1958 | WJC Charterhall [S+1.5] | 43 | XK120 | Norman Scott Wallace | N. J. Scott Wallace | raced |
| 28.9.1958 | WJC Charterhall [GT] | 43 | XK120 | Norman Scott Wallace | N. J. Scott Wallace | raced |
| 28.9.1958 | WJC Charterhall [Racing] | 50 | D-type | Peter Mould | P. Mould | DNA |
| 28.9.1958 | WJC Charterhall [S+1.5] | 50 | D-type | Peter Mould | P. Mould | DNA |
| 28.9.1958 | ICNSCC Ellensburg [Modified] | 51 | D-type | Jim Rattenbury | | 2nd |
| 28.9.1958 | WJC Charterhall [Racing] | 53 | C-type | Tom Candlish | T. T. Candlish | DNA |
| 28.9.1958 | WJC Charterhall [S+1.5] | 53 | C-type | Tom Candlish | T. T. Candlish | 4th |
| 28.9.1958 | WJC Charterhall [GT] | 63 | XK120 | R. T. Fawdington | R. T. Fawdington | ?th |
| 28.9.1958 | WJC Charterhall [GT] | 64 | XK150 | Charles Ramsay | C. A. Ramsay | 2nd |
| 28.9.1958 | WJC Charterhall [S+1.5] | 71 | D-type | Ron Flockhart | Ecurie Ecosse | 2nd |
| 28.9.1958 | WJC Charterhall [Racing] | 71 | D-type | Ron Flockhart | Ecurie Ecosse | 1st |
| 28.9.1958 | WJC Charterhall [GT] | 78 | XK120 | A. A. P. Fildes | A. Fildes | raced |
| 28.9.1958 | WJC Charterhall [S+1.5] | 78 | XK120 | A. A. P. Fildes | A. Fildes | DNA |
| 28.9.1958 | Hourglass Field [BP+CP] | | XK120 | Bill Love | | ?th |
| 4.10.1958 | Preliminary Virginia [Novice] | 125 | XK140 MC | Henry Grimes | | 1st |
| 5.10.1958 | SCCA Regional Thompson [Modified+UR] | 8 | Special | Gerry Georgi | Jerry Georgi | 6th |
| 5.10.1958 | SCCA Regional Thompson [BP+CP] | 27 | XK140 | Frederick de Bernardis | | 8th |
| 5.10.1958 | SCCA National Virginia [BP+CP+DP+EP] | 30 | XK140 | Frank Motley | | DNF |
| 5.10.1958 | SCCA Regional Thompson [BP+CP] | 40 | XK140 MC | Gordon Morris | | 7th |
| 5.10.1958 | SCCA Regional Thompson [BP+CP] | 43 | XK150 S | Kenneth MacDonald | Ken MacDonald | 4th |
| 5.10.1958 | SCCA National Vaca Valley [BP+CP+DP] | 47 | XK150 | Cliff Wright | | 6th |
| 5.10.1958 | SCCA Regional Thompson [Modified+UR] | 52 | C-type | Gordon MacKenzie | | 4th |
| 5.10.1958 | SCCA Regional Thompson [BP+CP] | 64 | XK120 M | William Hendrix | W. L. Hendrix | 6th |
| 5.10.1958 | SCCA National Vaca Valley [BP+CP+DP] | 77 | XK150 | Andy Nielsen | | 12th |
| 5.10.1958 | SCCA Regional Thompson [BP+CP] | 80 | XK150 S | Harry Carter | | DNS |
| 5.10.1958 | SCCA National Vaca Valley [BP+CP+DP] | 82 | Coupe | Roger Mace | | DNF |
| 5.10.1958 | BRSCC Brands Hatch [Production] | 89 | XK120 | John Fredman | H. J. Fredman | DNA |
| 5.10.1958 | SCCA National Vaca Valley [BM+CM+DM+EM+FM] | 100 | D-type | Ray Seher | | 6th |
| 5.10.1958 | SCCA Regional Thompson [BP+CP] | 100 | XK120 | Bruce Cargill | | 5th |
| 5.10.1958 | SCCA National Vaca Valley [BP+CP+DP] | 105 | XK120 | George Heaney | | 10th |
| 5.10.1958 | SCCA National Virginia [BP+CP+DP+EP] | 125 | XK140 MC | Henry Grimes | | 18th |
| 5.10.1958 | SCCA National Virginia [BP+CP+DP+EP] | 190 | XK150 S | Bob Grossman | | 5th |
| 11.10.1958 | LCCC Oulton Park [Sports] | 6 | D-type | Peter Mould | Peter Mould | DNA |
| 11.10.1958 | LCCC Oulton Park [Sports] | 6 | D-type | Peter Mould | Peter Mould | DNA |
| 11.10.1958 | LCCC Oulton Park [Formula Libre] | 6 | D-type | Peter Mould | Peter Mould | DNA |
| 11.10.1958 | Preliminary Venice [CM+DM+EM+FM+BP+CP+DP] | 10 | D-type | Ed Rahal | | 1st |
| 11.10.1958 | LCCC Oulton Park [Sports] | 25 | D-type | Peter Blond | Peter Blond | DNS |
| 11.10.1958 | LCCC Oulton Park [Formula Libre] | 25 | D-type | Peter Blond | Peter Blond | DNA |
| 11.10.1958 | LCCC Oulton Park [Sports] | 25 | D-type | Peter Blond | Peter Blond | DNS |
| 11.10.1958 | 1 h Snetterton | 52 | Mark I 3.4 | | J. Coombs | DNA |
| 11.10.1958 | LCCC Oulton Park [Sports] | 55 | Mk VII | Bob Berry | Bob Berry | DNF |
| 11.10.1958 | LCCC Oulton Park [Sports] | 55 | Mk VII | Bob Berry | Bob Berry | ?th |
| 11.10.1958 | LCCC Oulton Park [Formula Libre] | 55 | Mk VII | Bob Berry | Bob Berry | 7th |
| 11.10.1958 | 1 h Snetterton | 56 | Mark I 3.4 | Tommy Sopwith | Equipe Endeavour | 1st |
| 11.10.1958 | 1 h Snetterton | 57 | Mark I 3.4 | G. Bailey | Equipe Endeavour | DNA |
| 11.10.1958 | 1 h Snetterton | 59 | Mark I 2.4 | Peter Jopp | P. Jopp | DNF |
| 11.10.1958 | LCCC Oulton Park [Sports] | 69 | D-type | Reg Harris | J. C. Broadhead | DNS |
| 11.10.1958 | LCCC Oulton Park [Formula Libre] | 69 | D-type | Reg Harris | J. C. Broadhead | unused |
| 11.10.1958 | LCCC Oulton Park [Sports] | 69 | D-type | Reg Harris | J. C. Broadhead | unused |
| 11.10.1958 | SMRC Snetterton [Sports] | 80 | D-type | Peter Mould | P. Mould | DNF |
| 11.10.1958 | LCCC Oulton Park [Sports] | 96 | XK120 | W. P. Sheppard | W. P. Sheppard | DNA |
| 11.10.1958 | LCCC Oulton Park [Sports] | 96 | XK120 | W. P. Sheppard | W. P. Sheppard | DNS |
| 12.10.1958 | 6 h Venice | 10 | D-type | Ed Rahal | | ?th |
| 12.10.1958 | SCCA Regional Wilmot [CP+DP+EP] | 11 | | Dick Novotny | | DNF |
| 12.10.1958 | USAC Riverside | 27 | D-type | Bill Krause | Frank Millard | 3rd |
| 12.10.1958 | SCCA Regional Wilmot [CP+DP+EP] | 74 | | Roy Fleischman | | 1st |
| 12.10.1958 | Riverside [BP+CP+DP+EP+FP] | 82 | XK140 | Bob Baxter | Jack Furcha | DNF |
| 12.10.1958 | Riverside [BP+CP+DP+EP+FP] | 137 | XK120 | George Duncan | West Coast Racing | 11th |
| 18.10.1958 | SCCA Regional Lime Rock [UR+FIII] | 46 | Special | Gerry Georgi | | 1st |
| 19.10.1958 | SCCA Regional Lime Rock [BP+CP+DP] | 9 | XK150 S | Bob Grossman | | 3rd |
| 19.10.1958 | SCCA Regional Lime Rock [BP+CP+DP] | 40 | XK140 MC | Gordon Morris | | 13th |
| 19.10.1958 | SCCA Regional Lime Rock [Main] | 46 | Special | Gerry Georgi | | 3rd |
| 19.10.1958 | SCCA Regional Lime Rock [Main] | 52 | C-type | Gordon MacKenzie | | 5th |
| 19.10.1958 | SCCA Regional Lime Rock [BP+CP+DP] | 76 | XK140 MC | Frederick de Bernardis | | raced |
| 19.10.1958 | SCCA Regional Lime Rock [BP+CP+DP] | 103 | XK120 | Bruce Cargill | | 8th |
| 25.10.1958 | Preliminary Minden [BM+CM+DM+EM] | | D-type | Ray Seher | | 3rd |
| 26.10.1958 | SCCA Regional Dothan [Main] | 2 | Special | Peyton McCormack | Peyton McCormack | DNA |
| 26.10.1958 | SCCA Regional Dothan [Main] | 10 | D-type | Ed Rahal | Ed Rahal | DNA |
| 26.10.1958 | Preliminary Dothan [Ladies] | 36 | XK120 | Virginia Benton | Virginia Benton | DNA |
| 26.10.1958 | SCCA Regional Dothan [Main] | 77 | D-type | C. K. Thompson | C. K. Thompson | DNF |
| 26.10.1958 | Minden [BP+CP+DP] | 105 | XK120 | George Heaney | | 12th |
| 26.10.1958 | SCCA Regional Dothan [DP+EP+XK+Veloce] | | | | | ?th |
| 26.10.1958 | SCCA Regional Dothan [DP+EP+XK+Veloce] | | | | | ?th |