| 14.9.1958 | SCCA Regional Meadowdale [FP+GP+HP+HM] | 86 | Giulietta Veloce | L. J. Green | | DNA |
| 14.9.1958 | 500 mile Rafaela | | 1900 Zagato | Domingo Vita | | 8th |
| 19.9.1958 | Preliminary Watkins Glen [Ladies] | 82 | Giulietta Veloce | Beulah Bailey | Barry Budlong, Jr. | 2nd |
| 20.9.1958 | SCCA National Watkins Glen [FP+GP] | 14 | Giulietta Veloce | David Elder | David Elder | 5th |
| 20.9.1958 | SCCA National Watkins Glen [FP+GP] | 39 | Giulietta | Jim Fitzgerald | James J. Fitzgerald | DNA |
| 20.9.1958 | SCCA National Watkins Glen [FP+GP] | 47 | Giulietta Veloce | Chuck Stoddard | | 4th |
| 20.9.1958 | SCCA National Watkins Glen [FP+GP] | 55 | Giulietta Veloce | Bob Rubin | | DNF |
| 20.9.1958 | SCCA National Watkins Glen [FP+GP] | 79 | Giulietta Veloce | Ben Hitchcock | Ben Hitchcock | 16th |
| 20.9.1958 | SCCA National Watkins Glen [FP+GP] | 82 | Giulietta Veloce | Barry Budlong | Barry Budlong, Jr. | DNF |
| 20.9.1958 | SCCA National Watkins Glen [FP+GP] | 85 | Giulietta Veloce | Norman Webb | Norman H. Webb, Jr. | 9th |
| 20.9.1958 | SCCA National Watkins Glen [FP+GP] | 116 | Giulietta Veloce | Ernest Browning | Ernest E. Browning | 11th |
| 20.9.1958 | SCCA National Watkins Glen [FP+GP] | 120 | Giulietta Veloce | David Schiff | David T. Schiff | DNF |
| 20.9.1958 | SCCA National Watkins Glen [FP+GP] | 131 | Giulietta Veloce | Herman Melotti | Herman J. Melotti | 10th |
| 20.9.1958 | SCCA National Watkins Glen [FP+GP] | 158 | Giulietta Veloce | John Guthrie | | DNF |
| 20.9.1958 | SCCA National Watkins Glen [FP+GP] | 190 | Giulietta Veloce | Bob Grossman | Robert M. Grossman | 23rd |
| 20.9.1958 | SCCA National Watkins Glen [FP+GP] | 211 | Giulietta Veloce | Ernst Scheeder | Ernest W. Scheeder | 12th |
| 20.9.1958 | SCCA National Watkins Glen [FP+GP] | 222 | Giulietta Super | Louis Comito | Louis Comito | DNA |
| 20.9.1958 | SCCA National Watkins Glen [FP+GP] | 441 | Giulietta Veloce | John Willock | John Willock | DNA |
| 20.9.1958 | SCCA National Watkins Glen [FP+GP] | 711 | Giulietta Veloce | David Findlay | David Findlay | 13th |
| 20.9.1958 | Taça Cidade de Luanda | | Giulietta Spider | Vasco Cardiga | | raced |
| 20.9.1958 | Taça Cidade de Luanda | | Giulietta Veloce | Daniel de Magalhăes | | raced |
| 20.9.1958 | Taça Cidade de Luanda | | Giulietta Veloce | Rui Fragoso | | raced |
| 21.9.1958 | LISCA Lime Rock [FP+GP] | 5 | Giulietta Veloce | Louis Comito | | ?th |
| 21.9.1958 | GP Angola | 11 | Giulietta Sprint | | | raced |
| 21.9.1958 | GP Angola | 23 | Giulietta Spider | Vasco Cardiga | | 9th |
| 21.9.1958 | Tour de France | 28 | Giulietta | Hébert / Consten | | ?th |
| 21.9.1958 | Tour de France | 31 | Giulietta TI | Oreiller / Masoero | | ?th |
| 21.9.1958 | Tour de France | 39 | Giulietta TI | Loyer / Bonjean | | raced |
| 21.9.1958 | Tour de France | 41 | Giulietta | Thépenier / Cicoira | | raced |
| 21.9.1958 | LISCA Lime Rock [FP+GP] | 51 | Giulietta Veloce | Tom O'Brien | | ?th |
| 21.9.1958 | Avus [GT1.6] | 71 | Giulietta Veloce | Rudolf Wilhelm Moser | Rudolf W. Moser | 8th |
| 21.9.1958 | Avus [GT1.6] | 72 | Giulietta Sprint Veloce | Karl Foitek | Karl Foitek | 6th |
| 21.9.1958 | Avus [GT1.6] | 74 | Giulietta Veloce | Kurt Ahrens | Kurt Ahrens | DNA |
| 21.9.1958 | Avus [GT1.6] | 75 | Giulietta Veloce | Hans-Helmuth Hespen | Helmuth Hespen | DNA |
| 21.9.1958 | Avus [GT1.6] | 76 | Giulietta Sprint Veloce Zagato | | Auto-Wax | DNF |
| 21.9.1958 | Avus [GT1.6] | 77 | Giulietta Veloce | Horst Estler | Horst Estler | DNA |
| 21.9.1958 | Avus [GT1.6] | 78 | Giulietta Sprint Zagato | Edgar Berney | Edgar Berney | DNA |
| 21.9.1958 | Tour de France | 135 | Giulietta Veloce | Dumay / Audemard | | 18th |
| 21.9.1958 | Tour de France | 137 | Giulietta Sprint Veloce Zagato | Berney / Gretener | | raced |
| 21.9.1958 | LISCA Lime Rock [FP+GP] | 172 | Giulietta Veloce | Tony Bellini | | ?th |
| 21.9.1958 | Preliminary Galveston [EP+FP+GP] | | Giulietta Veloce | Jerry Morton | | 3rd |
| 21.9.1958 | Preliminary Galveston [EP+FP+GP] | | Giulietta Sprint Veloce | Fred Van Beuren | | ?th |
| 21.9.1958 | SCCA Regional Galveston [BP+CP+DP+EP+FP+GP] | | Giulietta Spider Veloce | Bill Hughes | | 8th |
| 21.9.1958 | Del Mar [Novice] | | Giulietta Veloce | J. Speckins | | ?th |
| 21.9.1958 | Del Mar [FP+GP+HP] | | Giulietta | Don Burrows | | 3rd |
| 21.9.1958 | Preliminary Galveston [EP+FP+GP] | | Giulietta Spider Veloce | Bill Hughes | | 1st |
| 21.9.1958 | Tour de France | | Giulietta | "Fantomas" / Lancelotti | | ?th |
| 21.9.1958 | Tour de France | | Giulietta TI | Archambault / Pare | | ?th |
| 21.9.1958 | Tour de France | | Giulietta TI | Dubois | | DNF |
| 21.9.1958 | Tour de France | | Giulietta | Tavola / Marini | | raced |
| 21.9.1958 | Tour de France | | Giulietta | Ravan / Limousin | | raced |
| 21.9.1958 | Tour de France | | Giulietta TI | Gacon / Borsa | | DNF |
| 21.9.1958 | SCCA Regional Galveston [BP+CP+DP+EP+FP+GP] | | Giulietta Veloce | Jerry Morton | | 7th |
| 21.9.1958 | Tour de France | | 1900 SS | Beudin / "Rietti" | | raced |
| 21.9.1958 | Tour de France | | 1900 TI | Cestelli-Guidi / "Due Cento Tre" | | DQ |
| 28.9.1958 | ICNSCC Ellensburg [AP+BP+CP+DP+EP] | 65 | Giulietta Veloce | Jim Greenfield | | DNF |
| 28.9.1958 | ICNSCC Ellensburg [FP+GP+HP+IP] | 84 | Giulietta Spider | Scott Redfield | | 1st |
| 28.9.1958 | ICNSCC Ellensburg [AP+BP+CP+DP+EP] | 145 | Giulietta Veloce | Tom Pillette | | 7th |
| 28.9.1958 | ICNSCC Ellensburg [AP+BP+CP+DP+EP] | 571 | Giulietta Veloce | Don Tindall | | 6th |
| 28.9.1958 | Hourglass Field [FP+GP+HP] | | Giulietta Spider | Robert Patton | | ?th |
| 28.9.1958 | Consolation Hourglass Field | | Giulietta Spider | Don Burrows | | 3rd |
| 28.9.1958 | Hourglass Field [FP+GP+HP] | | Giulietta Veloce | Willie West | | 3rd |
| 28.9.1958 | Hourglass Field [FP+GP+HP] | | Giulietta Veloce | Frank Aldhous | | 2nd |
| 5.10.1958 | SCCA Regional Thompson [GP+HP] | 6 | Giulietta Veloce | Jim Silberman | | 1st |
| 5.10.1958 | SCCA National Vaca Valley [GM+HM+GP+HP] | 8 | Giulietta Spider Veloce | Ron Hathaway | | 8th |
| 5.10.1958 | SCCA Regional Thompson [GP+HP] | 10 | Giulietta Sprint Veloce | George Fogg | | DNA |
| 5.10.1958 | SCCA Regional Thompson [GP+HP] | 17 | Giulietta Veloce | Henry Dingley | Henry Dingley, Jr. | 8th |
| 5.10.1958 | SCCA National Virginia [FP+GP+HM] | 20 | Giulietta Spider Veloce | Robert Stewart | | 3rd |
| 5.10.1958 | Eifelrennen Nürburgring | 20 | Giulietta Veloce | Rudolf Wilhelm Moser | Rudolf Moser | DNA |
| 5.10.1958 | Eifelrennen Nürburgring | 21 | Giulietta Veloce | Hans-Helmuth Hespen | Hans Helmuth Hespen | DNA |
| 5.10.1958 | Eifelrennen Nürburgring | 24 | Giulietta Sprint Veloce Zagato | Herbert Schultze | Herbert Schulze | ?th |
| 5.10.1958 | Eifelrennen Nürburgring | 25 | Giulietta Veloce | Horst Estler | H. G. Estler | DNA |
| 5.10.1958 | SCCA National Virginia [FP+GP+HM] | 26 | Giulietta Veloce | Don Erlbeck | | 5th |
| 5.10.1958 | Innsbruck [GT1.3] | 40 | Giulietta Sprint Veloce Zagato | "Frederic" | OeASC | DNF |
| 5.10.1958 | Innsbruck [GT1.3] | 41 | Giulietta Sprint Veloce Zagato | | Racing Club 19 | DNA |
| 5.10.1958 | Innsbruck [GT1.3] | 42 | Giulietta Veloce | Kurt Rost | Kurt Rost | DNA |
| 5.10.1958 | Innsbruck [GT1.3] | 43 | Giulietta Sprint Veloce Zagato | "Kim" | Scuderia Sant'Ambroeus | 1st |
| 5.10.1958 | Innsbruck [GT1.3] | 44 | Giulietta Sprint Veloce Zagato | Kurt Ahrens | Kurt Ahrens | 2nd |
| 5.10.1958 | SCCA Regional Thompson [GP+HP] | 44 | Giulietta Sprint Veloce | John Willock | | 4th |
| 5.10.1958 | Innsbruck [GT1.3] | 46 | Giulietta Sprint Veloce | Piera Bertoletti | Piera Bertoletti | DNF |
| 5.10.1958 | Innsbruck [GT1.3] | 47 | Giulietta Sprint Veloce | Adrian Hoven | | ?th |
| 5.10.1958 | SCCA Regional Thompson [GP+HP] | 50 | Giulietta Veloce | Bud Riley | | 7th |
| 5.10.1958 | Innsbruck [GT1.3] | 55 | Giulietta Spider | | | DNF |
| 5.10.1958 | SCCA Regional Thompson [GP+HP] | 55 | Giulietta Veloce | Charlie Rainville | Charles Rainville | DNF |
| 5.10.1958 | SCCA Regional Thompson [GP+HP] | 60 | Giulietta Veloce | Robert Pettit | | 3rd |
| 5.10.1958 | Innsbruck [GT+1.6/S1.1] | 62 | 1900 SS Zagato | Massimo Leto di Priolo | Scuderia Ambrosiana | DNA |
| 5.10.1958 | Innsbruck [GT+1.6/S1.1] | 65 | 1900 SS Touring | Luigi Messedaglia | Scuderia Ambrosiana | DNA |
| 5.10.1958 | SCCA Regional Thompson [GP+HP] | 71 | Giulietta Veloce | John Clapp | | 12th |
| 5.10.1958 | SCCA Regional Thompson [GP+HP] | 72 | Giulietta Veloce | Ernest Browning | | 13th |
| 5.10.1958 | SCCA Regional Thompson [GP+HP] | 79 | Giulietta Veloce | Tony Bellini | | 5th |
| 5.10.1958 | SCCA Regional Thompson [GP+HP] | 83 | Giulietta Veloce | Malcolm Donaldson | | 6th |
| 5.10.1958 | SCCA National Virginia [FP+GP+HM] | 90 | Giulietta Spider Veloce | Bob Grossman | | 2nd |
| 5.10.1958 | SCCA National Vaca Valley [BM+CM+DM+EM+FM] | 140 | Giulietta Veloce | Ed Crooks | | DNF |
| 5.10.1958 | SCCA National Vaca Valley [GM+HM+GP+HP] | 148 | Giulietta Veloce | Steve Froines | | 5th |
| 5.10.1958 | SCCA Regional Thompson [GP+HP] | 155 | Giulietta Veloce | Bob Rubin | | 2nd |
| 5.10.1958 | SCCA National Vaca Valley [GM+HM+GP+HP] | 166 | Giulietta Veloce | Willam Cook | | 6th |
| 5.10.1958 | SCCA Regional Thompson [GP+HP] | 177 | Giulietta Veloce | Ken Long | | 11th |
| 5.10.1958 | Coupes du Salon | | Giulietta Sprint Veloce Zagato | Edgar Berney | | 6th |
| 5.10.1958 | Eifelrennen Nürburgring | | Giulietta | | | ?th |
| 11.10.1958 | 1 h Snetterton | 39 | Giulietta Spider | Bruno Ferrari | Scuderia Madunina | 13th |