| 17.8.1958 | SCCA National Montgomery [BP+CP] | 19 | XK150 S | Bob Grossman | | 4th |
| 17.8.1958 | SCCA National Montgomery [BM+CM+DM+EM] | 52 | C-type | Gordon MacKenzie | Gordon MacKenzie | 6th |
| 17.8.1958 | SCCA National Montgomery [BP+CP] | 67 | XK150 S | Louis Hatcher | | 7th |
| 17.8.1958 | SCCA National Montgomery [BP+CP] | 80 | XK150 S | Harry Carter | | 2nd |
| 17.8.1958 | SCCA National Montgomery [BP+CP] | 127 | XK150 S | Andrew Nicholas | | DNF |
| 17.8.1958 | SCCA National Montgomery [BM+CM+DM+EM] | 149 | D-type | George Constantine | | DNF |
| 23.8.1958 | LASC Green Acres [S+2.0] | 73 | XKSS | Don Stewart | D. P. Stewart | DNA |
| 23.8.1958 | LASC Green Acres [Unrestricted] | 73 | XKSS | Don Stewart | D. P. Stewart | DNA |
| 23.8.1958 | LASC Green Acres [Le Mans] | 73 | XKSS | Don Stewart | D. P. Stewart | DNA |
| 23.8.1958 | BARC Goodwood [Handicap A] | | XK150 | Miss Rosemary Massey | | 1st |
| 23.8.1958 | BARC Goodwood [Handicap A] | | 3.8 | J. B. L. Jacobs | | 3rd |
| 30.8.1958 | NSCC Silverstone [S+2.7] | 31 | | Bill Allen | Curtis Smith Racing Team | DNA |
| 30.8.1958 | Novice Mansfield [S+1.6] | 49 | XK120 M | Lee L. Brown | Lee L. Brown | DNA |
| 30.8.1958 | Novice Mansfield [S+1.6] | 55 | XK150 Coupe | Gene Conant | Gene Conant | DNA |
| 30.8.1958 | NSCC Silverstone [Formula Libre Heat 2] | 58 | C-type | Gil Tyrer | G. Tyrer | DNA |
| 30.8.1958 | NSCC Silverstone [S+2.7] | 58 | C-type | Gil Tyrer | G. Tyrer | DNA |
| 30.8.1958 | NSCC Silverstone [S+2.7] | 61 | C-type | Mike Salmon | M. Salmon | DNA |
| 30.8.1958 | NSCC Silverstone [Formula Libre Heat 2] | 61 | C-type | Mike Salmon | M. Salmon | DNA |
| 31.8.1958 | Courtland [CM+DM+EM+FM+BP+CP+DP+EP] | 10 | D-type | Ed Rahal | | 3rd |
| 31.8.1958 | Courtland Trophy | 10 | D-type | Ed Rahal | | 1st |
| 31.8.1958 | Preliminary Mansfield [CM+DM+EM+BP+CP+UR] | 49 | XK120 M | Lee L. Brown | Lee L. Brown | DNA |
| 31.8.1958 | SCCA Regional Mansfield [BP+CP+DP+EP+FP] | 49 | XK120 M | Lee L. Brown | Lee L. Brown | DNA |
| 31.8.1958 | Preliminary Thompson [BM+CM+DM+EM] | 52 | C-type | Gordon MacKenzie | | 10th |
| 31.8.1958 | SCCA Regional Mansfield [CM+DM+EM+FM+GM+UR] | 55 | XK150 Coupe | Gene Conant | Gene Conant | DNA |
| 31.8.1958 | Preliminary Mansfield [CM+DM+EM+BP+CP+UR] | 55 | XK150 Coupe | Gene Conant | Gene Conant | DNA |
| 31.8.1958 | Santa Barbara [BP+CP+DP] | 80 | XK120 | James Matthews | | DNF |
| 31.8.1958 | Preliminary Thompson [BP+CP] | 80 | XK150 S | Harry Carter | | 5th |
| 31.8.1958 | Preliminary Thompson [BP+CP] | 99 | XK150 S | Bob Grossman | | 6th |
| 31.8.1958 | Preliminary Mansfield [CM+DM+EM+BP+CP+UR] | 112 | C-type | Mason O'Keiff | G. Mason O'Keiff | DNA |
| 31.8.1958 | SCCA Regional Mansfield [CM+DM+EM+FM+GM+UR] | 112 | C-type | Mason O'Keiff | G. Mason O'Keiff | DNA |
| 31.8.1958 | Preliminary Mansfield [CM+DM+EM+BP+CP+UR] | 116 | XKSS | Bob Stonedale | Bob Stonedale | DNA |
| 31.8.1958 | SCCA Regional Mansfield [CM+DM+EM+FM+GM+UR] | 116 | XKSS | Bob Stonedale | Bob Stonedale | DNA |
| 31.8.1958 | Santa Barbara [BM+CM+DM] | 127 | D-type | Bill Krause | | DNF |
| 31.8.1958 | Santa Barbara [BM+CM+DM] | 204 | Special | Don Hulette | | 9th |
| 31.8.1958 | Courtland [CM+DM+EM+FM+BP+CP+DP+EP] | | D-type | C. K. Thompson, Jr. | | DNF |
| 31.8.1958 | Deer Park [CM+DM+EM] | | D-type | Jim Rattenbury | | 1st |
| 31.8.1958 | Courtland Trophy | | D-type | C. K. Thompson | | 2nd |
| 1.9.1958 | SCCA National Thompson [BM+CM+DM+EM+FM] | 52 | C-type | Gordon MacKenzie | | 11th |
| 1.9.1958 | SCCA National Thompson [BP+CP+DP] | 80 | XK150 S | Harry Carter | | 3rd |
| 1.9.1958 | SCCA National Thompson [BP+CP+DP] | 99 | XK150 S | Bob Grossman | | 4th |
| 1.9.1958 | St. Eugene [S+1.6] | | XKSS | Stan McRobert | | 1st |
| 1.9.1958 | St. Eugene [Formula Libre] | | XK120 | Fred Richardson | | 2nd |
| 1.9.1958 | St. Eugene [Formula Libre] | | XKSS | Stan McRobert | | 1st |
| 6.9.1958 | SCCA National Road America [BP+CP+DP+EP] | 3 | XK150 S | Dave Causey | | 5th |
| 6.9.1958 | SCCA National Road America [BP+CP+DP+EP] | 17 | XK150 S | Howard Quick | | 17th |
| 6.9.1958 | SCCA National Road America [BP+CP+DP+EP] | 23 | XK120 | Dick Yoder | | 29th |
| 6.9.1958 | Sunbac Silverstone [S+1.5] | 33 | D-type | Gerry Ashmore | | 2nd |
| 6.9.1958 | SCCA National Road America [BP+CP+DP+EP] | 34 | XK150 S | Thurman Smock | | 10th |
| 6.9.1958 | SCCA National Road America [BP+CP+DP+EP] | 55 | XK140 MC | Schelble / Rediske | | 27th |
| 6.9.1958 | SCCA National Road America [BP+CP+DP+EP] | 59 | XK150 S | Joseph Concannon | | DNS |
| 6.9.1958 | SCCA National Road America [BP+CP+DP+EP] | 69 | XK120 | Jack Shaver | | DNA |
| 6.9.1958 | SCCA National Road America [BP+CP+DP+EP] | 74 | XK120 | Roy Fleischman | | 26th |
| 6.9.1958 | Sunbac Silverstone [Formula Libre Handicap] | | D-type | Gerry Ashmore | | 2nd |
| 6.9.1958 | Sunbac Silverstone [Hadicap 2] | | C-type | Mike Salmon | | raced |
| 6.9.1958 | Sunbac Silverstone [Production] | | | | | raced |
| 6.9.1958 | Sunbac Silverstone [Hadicap 3] | | C-type | A. C. Barrett-Greene | | DNF |
| 6.9.1958 | Sunbac Silverstone [S+1.5] | | C-type | A. C. Barrett-Greene | | 4th |
| 6.9.1958 | Sunbac Silverstone [S+1.5] | | C-type | Mike Salmon | | 3rd |
| 7.9.1958 | USAC Lime Rock | 6 | D-type | Marshall Teague | | 13th |
| 7.9.1958 | USAC Lime Rock | 8 | D-type | Jack Ensley | | 11th |
| 7.9.1958 | 500 mile Road America | 11 | XKSS | Causey / Norris | | DNF |
| 7.9.1958 | GP Leopoldville | 16 | XK150 | Phil Zwick | | 5th |
| 7.9.1958 | 500 mile Road America | 97 | D-type | Skogmo / Larson | | 23rd |
| 7.9.1958 | 500 mile Road America | 99 | XKSS | Alex / Schroeder | | 8th |
| 13.9.1958 | Tourist Trophy | 4 | D-type | Gregory / Ireland | Ecurie Ecosse | 5th |
| 13.9.1958 | Tourist Trophy | 6 | D-type | Hamilton / Blond | Duncan Hamilton | 6th |
| 13.9.1958 | Tourist Trophy | 12 | D-type | Sieff / Charles | Jonathan Sieff | 9th |
| 13.9.1958 | Harewood Acres [S+1.5] | 14 | XKSS | Ray Carter | | 1st |
| 13.9.1958 | Indian Summer Trophy | 14 | XKSS | Ray Carter | | raced |
| 14.9.1958 | SCCA Regional Meadowdale [CP+DP+EP] | 3 | XK150 S | Dave Causey | | DNA |
| 14.9.1958 | Preliminary Bridgehampton [BP+CP+DP+EP+FP+HP] | 9 | XK150 S | Bob Grossman | | 2nd |
| 14.9.1958 | SCCA Regional Bridgehampton [BP+CP+DP+EP+FP+GP] | 9 | XK150 S | Bob Grossman | | 2nd |
| 14.9.1958 | SCCA Regional Bridgehampton [BP+CP+DP+EP+FP+GP] | 13 | XK140 MC | Robert Ryan | | 7th |
| 14.9.1958 | Preliminary Bridgehampton [BP+CP+DP+EP+FP+HP] | 13 | XK140 MC | Robert Ryan | | 4th |
| 14.9.1958 | SCCA Regional Meadowdale [CP+DP+EP] | 17 | XK150 S | Howard Quick | | DNA |
| 14.9.1958 | SCCA Regional Meadowdale [CP+DP+EP] | 39 | XK120 | Ray Kennedy | | DNA |
| 14.9.1958 | SCCA Regional Bridgehampton [Modified] | 52 | C-type | Gordon MacKenzie | | 7th |
| 14.9.1958 | Preliminary Bridgehampton [Modified] | 52 | C-type | Gordon MacKenzie | | 5th |
| 14.9.1958 | Preliminary Bridgehampton [Handicap] | 60 | D-type | Walt Hansgen | Briggs Cunningham | 1st |
| 14.9.1958 | SCCA Regional Bridgehampton [Modified] | 60 | D-type | Walt Hansgen | Briggs Cunningham | 1st |
| 14.9.1958 | Preliminary Bridgehampton [Modified] | 60 | D-type | Walt Hansgen | Briggs Cunningham | 2nd |
| 14.9.1958 | SCCA Regional Meadowdale [CP+DP+EP] | 69 | XK120 M | Jack Shaver | | DNA |
| 14.9.1958 | SCCA Regional Meadowdale [BM+CM+DM+BP] | 75 | C-type | Bill Zorn | | DNA |
| 14.9.1958 | SCCA Regional Meadowdale [CP+DP+EP] | 88 | XK120 | Ken Umpenhour | | DNA |
| 14.9.1958 | SCCA Regional Meadowdale [BM+CM+DM+BP] | 99 | XKSS | Tossie Alex | | DNA |
| 20.9.1958 | SCCA National Watkins Glen [BP+CP] | 17 | XK150 S | Bernard Groh | Dr. Bernard F. Groh | 10th |
| 20.9.1958 | Oulton Park International [S+1.1] | 38 | C-type | Mike Salmon | Gerrards Cross Motor Co. Ltd. | ?th |
| 20.9.1958 | Oulton Park International [S+1.1] | 39 | D-type | Peter Blond | Peter Blond | DNA |
| 20.9.1958 | Oulton Park International [S+1.1] | 40 | D-type | Jonathan Sieff | Jonathan Sieff | 8th |
| 20.9.1958 | Oulton Park International [S+1.1] | 44 | D-type | Reg Harris | J. C. Broadhead | DNF |
| 20.9.1958 | Oulton Park International [S+1.1] | 45 | D-type | Peter Mould | Peter Mould | DNA |
| 20.9.1958 | SCCA National Watkins Glen [BP+CP] | 80 | XK150 S | Harry Carter | Harry E. Carter | 3rd |
| 20.9.1958 | SCCA National Watkins Glen [BP+CP] | 106 | XK150 S | Paul McGeorge | Paul McGeorge | DNF |
| 20.9.1958 | SCCA National Watkins Glen [BP+CP] | 115 | XK150 S | Bruce Cargill | Bruce C. Cargill | DNF |
| 20.9.1958 | SCCA National Watkins Glen [BP+CP] | 117 | XK150 S | Slako Bilinski | Slako Bilinski | 15th |
| 20.9.1958 | SCCA National Watkins Glen [BP+CP] | 133 | XK150 S | Kenneth MacDonald | | 13th |
| 20.9.1958 | SCCA National Watkins Glen [BP+CP] | 160 | | Robert Ryan | | 8th |
| 20.9.1958 | SCCA National Watkins Glen [BP+CP] | 161 | | Clifford R. Kline | | 14th |
| 20.9.1958 | Taça Cidade de Luanda | | XK140 | João Alves | | raced |
| 20.9.1958 | Taça Cidade de Luanda | | XK120 | Dias Gomes | | raced |