| 8.2.1958 | Preliminary Pomona [Production 1.3] | 0 | Giulietta | Martin Hosch | Martin Hosch | 10th |
| 8.2.1958 | Preliminary Pomona [Production 1.3] | 241 | Giulietta | Eugene Lee | Eugene Lee | 6th |
| 9.2.1958 | Pomona [Production 2.0] | 0 | Giulietta | Martin Hosch | Martin Hosch | 21st |
| 9.2.1958 | Pomona [Production 2.0] | 120 | Giulietta | Aldhous | J. R. Webb | 17th |
| 9.2.1958 | Pomona [Production 2.0] | 197 | Giulietta Veloce | Mike Roetnor | Michael Roetnor | 10th |
| 9.2.1958 | Pomona [Production 2.0] | 241 | Giulietta | Eugene Lee | Eugene Lee | 20th |
| 9.2.1958 | Pomona [Ladies] | 241 | Giulietta Spider | Maureen Lee | Eugene Lee | 9th |
| 16.2.1958 | Preliminary New Smyrna Beach [FP+GP+HP+HM] | 0 | Giulietta Veloce | Ray Anderson | | DNA |
| 16.2.1958 | SCCA Regional New Smyrna Beach [FP+GP+HP+HM] | 0 | Giulietta Veloce | Ray Anderson | | 4th |
| 16.2.1958 | SCCA Regional New Smyrna Beach [FP+GP+HP+HM] | 24 | | Forrest Dana | | DNA |
| 16.2.1958 | Preliminary New Smyrna Beach [FP+GP+HP+HM] | 24 | | Forrest Dana | | DNA |
| 16.2.1958 | Willow Springs [Ladies] | | | Gwen Charles | | DNF |
| 16.2.1958 | Willow Springs [Production 1.6] | | Giulietta | John Cooper | | raced |
| 1.3.1958 | Preliminary Phoenix [Novice] | 71 | Giulietta Veloce | Dick Mason | | DNF |
| 1.3.1958 | Grand Central [Sports Handicap] | | Giulietta Sprint Veloce | Horse Boyden | | 3rd |
| 2.3.1958 | SCCA Regional Phoenix [Production] | 201 | Giulietta Veloce | Frank Tracey | | 15th |
| 2.3.1958 | SCCA Regional Phoenix [FP+GP+HP+HM] | 201 | Giulietta Veloce | Frank Tracey | | 7th |
| 8.3.1958 | Novice Mansfield [S1.6] | 5 | Giulietta | W. A. Robinson | Jerry Morton | 1st |
| 9.3.1958 | SCCA Regional Mansfield [MGA+GP+KP+HM] | 5 | Giulietta | Jerry Morton | | 4th |
| 9.3.1958 | Preliminary Mansfield [MGA+GP+KP] | 5 | Giulietta | Jerry Morton | | 8th |
| 9.3.1958 | Preliminary Boca Raton [FP+GP+HP+KP+HM] | 18 | Giulietta | J. R. McMaster | | raced |
| 9.3.1958 | SCCA Regional Boca Raton [FP+GP+HP+KP+HM] | 18 | Giulietta | J. R. McMaster | | raced |
| 9.3.1958 | SCCA Regional Boca Raton [FP+GP+HP+KP+HM] | 71 | Giulietta | Paul Feltes | | raced |
| 9.3.1958 | Preliminary Boca Raton [FP+GP+HP+KP+HM] | 71 | Giulietta | Paul Feltes | | raced |
| 9.3.1958 | SCCA Regional Mansfield [MGA+GP+KP+HM] | 79 | Giulietta | N. G. Lorenson | | DNS |
| 9.3.1958 | Preliminary Mansfield [MGA+GP+KP] | 79 | Giulietta | N. G. Lorenson | | 4th |
| 9.3.1958 | SCCA Regional Boca Raton [FP+GP+HP+KP+HM] | 188 | Giulietta Veloce | David Lane | | 2nd |
| 9.3.1958 | Preliminary Boca Raton [FP+GP+HP+KP+HM] | 188 | Giulietta Veloce | David Lane | | 3rd |
| 16.3.1958 | Modena [S/GT] | | 1900 Super | Luciano Lombardini | | ?th |
| 16.3.1958 | Lago de Guadalupe | | 1900 Zagato | Carlos Basurta | | 2nd |
| 16.3.1958 | Modena [S/GT] | | Giulietta Veloce | Felice Omati | | ?th |
| 16.3.1958 | Modena [S/GT] | | Giulietta Sprint Veloce | Sergio Bettoja | Scudeira Campidoglio | 5th |
| 16.3.1958 | Modena [S/GT] | | Giulietta Veloce | Franco Ricci | Scudeira Casanova | ?th |
| 16.3.1958 | Modena [S/GT] | | Giulietta Veloce | Augusto Ciccolini | Racing Club 19 | ?th |
| 22.3.1958 | Preliminary Stockton [Sedan+Ladies+MG+FIII] | 38 | Giulietta Spider Veloce | Marion Lowe | | - |
| 22.3.1958 | 12 h Sebring | 50 | Giulietta Sprint Veloce | Van Beuren / Velasquez | Freddy van Beuren | 18th |
| 22.3.1958 | 12 h Sebring | 51 | Giulietta Veloce | Comito / Markelson / Pfaff | Louis Comito | 37th |
| 22.3.1958 | 12 h Sebring | 52 | Giulietta Spider Veloce | Rainville / Kaplan | Jake Kaplan | 24th |
| 23.3.1958 | SCCA Regional Stockton [Production 1.6] | 38 | Giulietta Spider Veloce | Marion Lowe | | 11th |
| 23.3.1958 | SCCA Regional Stockton [Production 1.6] | 78 | Giulietta Veloce | Ted Conrad | | 5th |
| 23.3.1958 | Preliminary Stockton [Novice Production 1.6] | 93 | Giulietta Spider Veloce | Ron Hathaway | | 1st |
| 23.3.1958 | SCCA Regional Stockton [Production 1.6] | 93 | Giulietta Spider Veloce | Ron Hathaway | | 6th |
| 23.3.1958 | Preliminary Stockton [Novice Production 1.6] | 168 | Giulietta Veloce | Willam Cook | | 10th |
| 30.3.1958 | Willow Springs [Main] | 16 | | Ray Woodman | Ray Woodman | DNA |
| 30.3.1958 | Willow Springs [Production 1.6] | 16 | | Ray Woodman | Ray Woodman | 3rd |
| 30.3.1958 | Willow Springs [Production 1.6] | 21 | Giulietta | John Cooper | F. B. Toler, Jr. | DNA |
| 30.3.1958 | Willow Springs [Main] | 21 | Giulietta | John Cooper | F. B. Toler, Jr. | DNA |
| 30.3.1958 | Willow Springs [Novice] | 96 | | Chuck Charles | Dick Marney | DNA |
| 30.3.1958 | Willow Springs [Production 1.6] | 96 | | Chuck Charles | Dick Marney | DNA |
| 30.3.1958 | Willow Springs [Main] | 96 | | Charles / Charles | Dick Marney | DNA |
| 30.3.1958 | Willow Springs [Production 1.6] | | Giulietta Spider Veloce | Keith Lindsey | Flintridge Motors | 1st |
| 30.3.1958 | Willow Springs [Production +1.6] | | 1900 SS | Al Caudebec | Flintridge Motors | raced |
| 30.3.1958 | Willow Springs [Main] | | Giulietta Spider Veloce | Keith Lindsey | | DNF |
| 5.4.1958 | BRSCC Full Sutton [PS1.5] | 28 | Giulietta | P. Jackson | | DNA |
| 5.4.1958 | 6 h South Africa | | Giulietta Sprint Veloce | Boyden / Millea | | 3rd |
| 7.4.1958 | 3 h Pau [GT2.0] | | | Ubersi | | ?th |
| 7.4.1958 | 3 h Pau [GT2.0] | | | Nicol | | ?th |
| 7.4.1958 | 3 h Pau [GT2.0] | | | Berney | | ?th |
| 7.4.1958 | 3 h Pau [GT2.0] | | | Zublena-Burggraf | | ?th |
| 7.4.1958 | 3 h Pau [GT2.0] | | Giulietta | Marcel Lauga | | 5th |
| 7.4.1958 | 3 h Pau [GT2.0] | | Giulietta Sprint Veloce | Sergio Bettoja | | 3rd |
| 7.4.1958 | 3 h Pau [GT2.0] | | Giulietta Sprint Veloce Zagato | Vidilles / da Silva Ramos | | 1st |
| 7.4.1958 | 3 h Pau [GT2.0] | | | Balsa | | DNF |
| 7.4.1958 | 3 h Pau [GT2.0] | | Giulietta | Jean-Pierre Schild | | 4th |
| 7.4.1958 | 3 h Pau [GT2.0] | | | Seidel | | DNF |
| 12.4.1958 | Grand Central [Sports] | 14 | Giulietta Sprint Veloce | Horse Boyden | | 3rd |
| 13.4.1958 | GP Avandaro | 50 | Giulietta Sprint Veloce | | | raced |
| 13.4.1958 | SCCA Regional Palm Springs [FP+GP+KP] | 50 | Giulietta Spider Veloce | Ron Hathaway | Ron Hathaway | DNS |
| 13.4.1958 | SCCA Regional Palm Springs [FP+GP+KP] | 61 | Giulietta | Martin Hosch | | DNF |
| 13.4.1958 | SCCA Regional Palm Springs [FP+GP+KP] | 65 | Giulietta Veloce | Ed Crooks | Ed Crooks | 11th |
| 13.4.1958 | SCCA Regional Palm Springs [FP+GP+KP] | 120 | Giulietta | Roger Webb | Roger Webb | DNS |
| 13.4.1958 | Preliminary Palm Springs [Ladies+FIII] | 120 | Giulietta Sprint | Shirley Webb | | DNS |
| 13.4.1958 | Preliminary Palm Springs [Ladies+FIII] | 138 | Giulietta Spider Veloce | Marion Lowe | Marion Lowe | 7th |
| 13.4.1958 | SCCA Regional Palm Springs [FP+GP+KP] | 138 | Giulietta Spider Veloce | Marion Lowe | | 9th |
| 13.4.1958 | SCCA Regional Palm Springs [FM+GM+HM] | 158 | | Bill Moeller | | DNS |
| 13.4.1958 | Coupes de Vitesse [GT1.0+TS] | | Giulietta | G. Gougry | | 3rd |
| 13.4.1958 | GP Avandaro [1.5] | | Giulietta Sprint Veloce | Fred Van Beuren | | 1st |
| 13.4.1958 | Coupes de Vitesse [GT1.0+TS] | | Giulietta | M. Salvy | | 2nd |
| 19.4.1958 | Giro di Sicilia | 30 | Giulietta Sprint Veloce | Zavagli | | 6th |
| 19.4.1958 | Giro di Sicilia | 36 | Giulietta Sprint Veloce Zagato | Casimiro Toselli | | 8th |
| 19.4.1958 | Giro di Sicilia | 90 | 1900 TI | Cestelli-Guidi / Musso | | 2nd |
| 20.4.1958 | SCCA National Marlboro [FP+GP+HM] | 9 | Giulietta Spider Veloce | Bob Grossman | | 5th |
| 20.4.1958 | Marlboro [Handicap 2nd Heat] | 9 | Giulietta Spider Veloce | Bob Grossman | | 4th |
| 20.4.1958 | SCCA National Marlboro [FP+GP+HM] | 21 | Giulietta | Allen Markelson | | DNF |
| 20.4.1958 | Preliminary Galveston [FP+GP] | 29 | Giulietta Spider | Norman Scott | | 4th |
| 20.4.1958 | SCCA National Marlboro [FP+GP+HM] | 40 | Giulietta | Ray Bloomer | | 11th |
| 20.4.1958 | Preliminary Galveston [FP+GP] | 55 | Giulietta Spider | Jerry Morton | | 2nd |
| 20.4.1958 | SCCA National Marlboro [FP+GP+HM] | 64 | Giulietta | Norman Webb | | 13th |
| 20.4.1958 | Marlboro [Handicap 2nd Heat] | 64 | Giulietta | Norman Webb | | 13th |
| 20.4.1958 | Marlboro [Handicap 2nd Heat] | 82 | Giulietta | Barry Budlong | | 15th |
| 20.4.1958 | SCCA National Marlboro [FP+GP+HM] | 82 | Giulietta | Barry Budlong | | 20th |
| 20.4.1958 | SCCA National Marlboro [FP+GP+HM] | 130 | Giulietta Spider | Art Tweedale | | 6th |
| 20.4.1958 | Marlboro [Handicap 2nd Heat] | 171 | Giulietta | Bill Krause | | 12th |
| 20.4.1958 | SCCA National Marlboro [FP+GP+HM] | 171 | Giulietta | Bill Krause | | 15th |
| 20.4.1958 | Marlboro [Handicap 2nd Heat] | 179 | Giulietta | Tony Briggs | | 10th |
| 20.4.1958 | SCCA National Marlboro [FP+GP+HM] | 179 | Giulietta | Tony Briggs | | 8th |
| 20.4.1958 | Trofeo Nuvolari Montjuich | | Giulietta TI | Bantista | | 9th |
| 20.4.1958 | Trofeo Nuvolari Montjuich | | 1900 SS | Martinez | | 4th |
| 20.4.1958 | Trofeo Nuvolari Montjuich | | | Escuder | | 5th |
| 20.4.1958 | Trofeo Nuvolari Montjuich | | | Solana | | 6th |