| 20.4.1958 | SCCA Regional Galveston [FP+GP] | 29 | Giulietta Spider | Norman Scott | | 4th |
| 20.4.1958 | SCCA Regional Galveston [FP+GP] | 55 | Giulietta Spider | Jerry Morton | | 2nd |
| 20.4.1958 | SCCA National Marlboro [FP+GP+HM] | 78 | Giulietta | Ken Haynes | | DNF |
| 20.4.1958 | SCCA National Marlboro [FP+GP+HM] | 129 | Giulietta | Ray Anderson | | DNF |
| 27.4.1958 | SCCA Regional Lime Rock [GP+HM+Sedan] | 35 | Giulietta | Bob Pratt | | DNA |
| 27.4.1958 | SCCA Regional Lime Rock [GP+HM+Sedan] | 39 | Giulietta Veloce | Ray Anderson | | 5th |
| 27.4.1958 | SCCA Regional Lime Rock [GP+HM+Sedan] | 52 | Giulietta Veloce | Norman Webb | | 4th |
| 27.4.1958 | SCCA Regional Lime Rock [GP+HM+Sedan] | 71 | Giulietta Veloce | John Clapp | | 1st |
| 27.4.1958 | SCCA Regional Lime Rock [GP+HM+Sedan] | 82 | Giulietta Veloce | Barry Budlong | | 3rd |
| 27.4.1958 | SCCA Regional Lime Rock [GP+HM+Sedan] | 111 | Giulietta Veloce | Bart Levenson | | 6th |
| 27.4.1958 | SCCA Regional Lime Rock [GP+HM+Sedan] | 152 | Giulietta Veloce | Bob Grossman | | 2nd |
| 27.4.1958 | Preliminary Dunnellon [race 1] | 188 | Giulietta Spider | David Lane | | 3rd |
| 27.4.1958 | SCCA Regional Louisville [MGA+GP+HM+Sedan] | | Giulietta | | | raced |
| 27.4.1958 | SCCA Regional Louisville [MGA+GP+HM+Sedan] | | Giulietta | | | 2nd |
| 27.4.1958 | GP Napoli | | | Giuseppe Ruggero | | 10th |
| 27.4.1958 | SCCA Regional Louisville [MGA+GP+HM+Sedan] | | Giulietta | | | raced |
| 27.4.1958 | SCCA Regional Louisville [MGA+GP+HM+Sedan] | | Giulietta | George Cheyne | | 1st |
| 27.4.1958 | Preliminary Louisville [MGA+GP] | | Giulietta | | | 2nd |
| 27.4.1958 | Preliminary Louisville [MGA+GP] | | Giulietta | George Cheyne | | 1st |
| 27.4.1958 | Preliminary Louisville [MGA+GP] | | Giulietta | | | 4th |
| 27.4.1958 | Preliminary Louisville [MGA+GP] | | Giulietta | | | 3rd |
| 27.4.1958 | Dunnellon [smaller car Main] | | Giulietta | David Lane | | 3rd |
| 27.4.1958 | GP Napoli [S1.5] | | | Pietro Fiordelisi | | 4th |
| 4.5.1958 | SCCA National Virginia [DP+EP+FP+GP+HP+KP+GM+HM] | 58 | | Art Tweedale | | DNA |
| 4.5.1958 | Preliminary Virginia [FP+GP+HP+KP+HM] | 58 | | Art Tweedale | | DNA |
| 4.5.1958 | SCCA National Virginia [DP+EP+FP+GP+HP+KP+GM+HM] | 78 | | Ken Haynes | | DNA |
| 4.5.1958 | Preliminary Virginia [FP+GP+HP+KP+HM] | 78 | | Ken Haynes | | DNA |
| 4.5.1958 | SCCA National Virginia [DP+EP+FP+GP+HP+KP+GM+HM] | 111 | | Bart Levenson | | DNA |
| 4.5.1958 | Preliminary Virginia [FP+GP+HP+KP+HM] | 111 | | Bart Levenson | | DNA |
| 4.5.1958 | SCCA National Virginia [DP+EP+FP+GP+HP+KP+GM+HM] | 158 | | John Guthrie | | DNA |
| 4.5.1958 | Preliminary Virginia [FP+GP+HP+KP+HM] | 158 | | John Guthrie | | DNA |
| 4.5.1958 | Preliminary Virginia [FP+GP+HP+KP+HM] | 171 | Giulietta Spider Veloce | Bill Hughes | | DNA |
| 4.5.1958 | SCCA National Virginia [DP+EP+FP+GP+HP+KP+GM+HM] | 171 | Giulietta Spider Veloce | Bill Hughes | | ?th |
| 4.5.1958 | SCCA National Virginia [DP+EP+FP+GP+HP+KP+GM+HM] | 179 | Giulietta | Tony Briggs | | ?th |
| 4.5.1958 | Preliminary Virginia [FP+GP+HP+KP+HM] | 179 | Giulietta | Tony Briggs | | DNA |
| 4.5.1958 | SCCA National Virginia [DP+EP+FP+GP+HP+KP+GM+HM] | | Giulietta Veloce | Bob Grossman | | ?th |
| 4.5.1958 | Preliminary Virginia [FP+GP+HP+KP+HM] | | Giulietta Veloce | Bob Grossman | | ?th |
| 10.5.1958 | Novice Tracy [Production 1.6] | 8 | Giulietta Spider Veloce | Ron Hathaway | Ron Hathaway | 7th |
| 10.5.1958 | 4 h Relay Harewood Acres | 9P | Giulietta Sprint | William Bradley | The Romeos | 24th |
| 10.5.1958 | 4 h Relay Harewood Acres | 9A | Giulietta Sprint | Joe Diamond | The Romeos | 24th |
| 10.5.1958 | 4 h Relay Harewood Acres | 9B | Giulietta Sprint | Nick Hartman | The Romeos | 24th |
| 10.5.1958 | 4 h Relay Harewood Acres | 9C | Giulietta Sprint | Dick Cremer | The Romeos | 24th |
| 10.5.1958 | Preliminary Tracy [Production 1.6] | 38 | Giulietta Veloce | Marion Lowe | Marion Lowe | DNA |
| 10.5.1958 | Novice Tracy [Production 1.6] | 41 | Giulietta Veloce | Ed Crooks | Ed Crooks | raced |
| 10.5.1958 | Novice Tracy [Modified] | 53 | 1900 C52 Disco Volante | Vernon Horst | Richard Feder | 5th |
| 10.5.1958 | Preliminary Tracy [Production 1.6] | 114 | Giulietta | Bob Lyons | Robert L. Lyons | ?th |
| 10.5.1958 | Novice Tracy [Production 1.6] | 114 | Giulietta Veloce | Wyn Robertson | Robert L. Lyons | DNA |
| 10.5.1958 | Preliminary Tracy [Production 1.6] | 147 | Giulietta Veloce | Robert Phillips | Robert W. Phillips | ?th |
| 10.5.1958 | Novice Tracy [Production 1.6] | 166 | Giulietta Veloce | Willam Cook | Willam Cook | DNA |
| 10.5.1958 | Preliminary Tracy [Production 1.6] | | Giulietta Spider Veloce | Ron Hathaway | | 12th |
| 11.5.1958 | SCCA Regional Tracy [Production Group A] | 3 | Giulietta | Prudence Baxter | Prudence Baxter | 10th |
| 11.5.1958 | Targa Florio | 4 | Giulietta Sprint Veloce | Taormina / Tacci | | DNF |
| 11.5.1958 | Targa Florio | 6 | Giulietta Sprint Veloce Zagato | Toselli / Filippa | | 12th |
| 11.5.1958 | Targa Florio | 8 | Giulietta Sprint Veloce Zagato | Abate / Balzarini | | 9th |
| 11.5.1958 | Targa Florio | 10 | Giulietta Sprint Veloce | Nicoly | | DNS |
| 11.5.1958 | Targa Florio | 12 | Giulietta Sprint Veloce | Marconi / Frescobaldi | | DNF |
| 11.5.1958 | Targa Florio | 14 | Giulietta Sprint Veloce Zagato | Pace / Peroglio | | 15th |
| 11.5.1958 | Targa Florio | 16 | Giulietta Sprint Veloce | Arena / Pagano | | DNF |
| 11.5.1958 | Targa Florio | 18 | Giulietta Sprint Veloce | Lo Coco / Guglielmini | | DNF |
| 11.5.1958 | Targa Florio | 20 | Giulietta Sprint Veloce Zagato | Bettoja / Feroldi | | DNF |
| 11.5.1958 | Targa Florio | 22 | Giulietta Sprint | Pizzo / Trapani | | DNS |
| 11.5.1958 | Targa Florio | 24 | Giulietta Sprint Veloce | Todaro / "Nessuno" | | 8th |
| 11.5.1958 | SCCA Regional Tracy [MG+Ladies+Sedan+FIII] | 38 | Giulietta Veloce | Marion Lowe | Marion Lowe | DNA |
| 11.5.1958 | SCCA Regional Tracy [Production Group B] | 38 | Giulietta Veloce | Marion Lowe | | DNA |
| 11.5.1958 | SCCA Regional Tracy [Production Group B] | 41 | Giulietta Veloce | Jack Dalton | | 4th |
| 11.5.1958 | SCCA Regional Tracy [CM+DM+EM] | 53 | 1900 C52 Disco Volante | Robert O'Brien | Richard Feder | 8th |
| 11.5.1958 | SCCA Regional Tracy [Production Group A] | 114 | Giulietta | Bob Lyons | Robert L. Lyons | DNA |
| 11.5.1958 | SCCA Regional Tracy [Production Group A] | 147 | Giulietta | Robert Phillips | Robert W. Phillips | 8th |
| 11.5.1958 | Targa Florio | | Giulietta | Cavaliere / Micciche / Ferro | | DNA |
| 11.5.1958 | Targa Florio | | Giulietta | Michele Tornatore | | DNA |
| 11.5.1958 | Targa Florio | | Giulietta | Marinoni | | DNA |
| 11.5.1958 | Targa Florio | | Giulietta | | | DNA |
| 15.5.1958 | Eläintarhanajo [GT] | 4 | | Jouko Nordell | | DNF |
| 15.5.1958 | Eläintarhanajo [GT] | 8 | Giulietta Sprint | Harald Kronegard | | 7th |
| 15.5.1958 | Aspern [GT+1.6] | 51 | 1900 SS Zagato | Massimo Leto di Priolo | Scuderia Ambrosiana | raced |
| 15.5.1958 | Aspern [GT+1.6] | 53 | GT | Walter Svitil | Walter Svitil | DNA |
| 15.5.1958 | Aspern [GT1.6] | 80 | Giulietta Veloce | Sepp Liebl | Sepp Liebl | DNA |
| 15.5.1958 | Aspern [GT1.6] | 81 | Giulietta Sprint Veloce | Karl Foitek | Karl Foitek | raced |
| 15.5.1958 | Aspern [GT1.6] | 82 | Giulietta Sprint Veloce | "Frederic" | ÖASC | raced |
| 15.5.1958 | Aspern [GT1.6] | 83 | Giulietta Sprint Veloce | Josef Steinbacher | Josef Steinbacher | raced |
| 15.5.1958 | Aspern [GT1.6] | 85 | Giulietta Sprint Veloce | Anton Steffan | | ?th |
| 18.5.1958 | GP Spa [GT2.0] | 1 | Giulietta Sprint Veloce | Ahrens | | 7th |
| 18.5.1958 | GP Spa [GT2.0] | 3 | Giulietta Veloce | Croisier | | ?th |
| 18.5.1958 | GP Spa [GT2.0] | 4 | Giulietta Veloce | Seidel | | DNF |
| 18.5.1958 | GP Spa [GT2.0] | 5 | Giulietta Veloce | Scheid | | ?th |
| 18.5.1958 | GP Spa [GT2.0] | 6 | Giulietta Veloce | Dubail | | DNF |
| 18.5.1958 | GP Spa [GT2.0] | 7 | Giulietta Veloce | Eric Catulle | Equipe Nationale Belge | 6th |
| 18.5.1958 | GP Spa [GT2.0] | 8 | Giulietta Veloce | Ubezzi | | ?th |
| 18.5.1958 | SCCA National Cumberland [GP+HP] | 9 | Giulietta Veloce | Bob Grossman | Robert H. Grossman | 4th |
| 18.5.1958 | GP Spa [GT2.0] | 9 | Giulietta | Henriquet | | ?th |
| 18.5.1958 | SCCA National Cumberland [GP+HP] | 14 | | David Elder | David W. Elder | DNA |
| 18.5.1958 | GP Spa [GT2.0] | 17 | Spyder | Demol | | ?th |
| 18.5.1958 | GP Spa [GT2.0] | 18 | Giulietta Sprint | Raminger | | DNF |
| 18.5.1958 | SCCA National Cumberland [GP+HP] | 21 | Giulietta | Allen Markelson | Allen Markelson | DNA |
| 18.5.1958 | SCCA National Cumberland [GP+HP] | 43 | | Carl Dorr | Carl J. Dorr | DNA |
| 18.5.1958 | SCCA National Cumberland [GP+HP] | 82 | Giulietta Veloce | Barry Budlong | Barry Budlong, Jr. | 1st |
| 18.5.1958 | Preliminary Cumberland [Ladies] | 82 | Giulietta Veloce | Beulah Bailey | Barry Budlong, Jr. | DNA |
| 18.5.1958 | SCCA National Cumberland [GP+HP] | 87 | Giulietta | Ernst Ruffini | Ernest Ruffini | DNA |
| 18.5.1958 | SCCA National Cumberland [GP+HP] | 95 | | Herman Melotti | Herman John Melotti | ?th |
| 18.5.1958 | SCCA National Cumberland [GP+HP] | 123 | | John H. Campbell | John H. Campbell | DNA |