| 8.2.1958 | Preliminary Pomona [Modified 1.0] | 1 | Special | Walker Edmiston | Buzz Wagner | 1st |
| 9.2.1958 | Pomona [S1.5] | 1 | Special | Walker Edmiston | Buzz Wagner | DNF |
| 9.2.1958 | Guadalajara [1.5] | | Special | Cesare Vigna | | ?th |
| 16.2.1958 | Preliminary New Smyrna Beach [FP+GP+HP+HM] | 101 | | Robert Shackelford | | DNA |
| 16.2.1958 | SCCA Regional New Smyrna Beach [FP+GP+HP+HM] | 101 | | Robert Shackelford | | DNA |
| 16.2.1958 | SCCA Regional New Smyrna Beach [FP+GP+HP+HM] | 555 | | William Buff | | DNA |
| 16.2.1958 | Preliminary New Smyrna Beach [FP+GP+HP+HM] | 555 | | William Buff | | DNA |
| 16.3.1958 | Modena [S/GT] | | 1100 Zagato | Alvise Foscari | Scudeira San Marco | ?th |
| 5.4.1958 | BRSCC Full Sutton [PS1.5] | 40 | | Älan Stross | | DNA |
| 7.4.1958 | 3 h Pau [GT2.0] | | 8V Zagato | Giancarlo Sala | | 2nd |
| 13.4.1958 | GP Avandaro | | Special | | | raced |
| 13.4.1958 | GP Avandaro | | Special | | | raced |
| 19.4.1958 | Giro di Sicilia | 108 | 1100/103 TV | Umberto La Manna | | raced |
| 19.4.1958 | Giro di Sicilia | 164 | Nuova 500 | Soldano / Soldano | | raced |
| 19.4.1958 | Giro di Sicilia | | Nuova 500 | Massimo Natili | | 5th |
| 27.4.1958 | WJC Charterhall [S1.5] | 1 | | M. Gilroy | M. Gilroy | DNA |
| 11.5.1958 | Targa Florio | 2 | 1100/103 TV | Mantia / Ramirez | | DNF |
| 11.5.1958 | Targa Florio | 28 | 8V | Dari / Cucchiarelli | | DNF |
| 11.5.1958 | Targa Florio | 36 | 8V | Fabi / Fabbri | | DNS |
| 11.5.1958 | Targa Florio | 38 | 8V | Vella / Termini | | DNF |
| 11.5.1958 | Targa Florio | 42 | 8V | Montalbano / Bologna | | 13th |
| 11.5.1958 | Targa Florio | 60 | 1100/103 TV | Cavaliere / Sirchia | | 14th |
| 11.5.1958 | Targa Florio | | 8V | Giordano / Rizzotti | | DNA |
| 11.5.1958 | Targa Florio | | 8V | Gugliandolo / Fulci | | DNA |
| 15.5.1958 | Aspern [GT+1.6] | 50 | 8V Zagato | Dore Leto di Priolo | Scuderia Ambrosiana | ?th |
| 18.5.1958 | GP Spa [GT2.0] | 11 | 1100 Spider | Dock | | ?th |
| 18.5.1958 | GP Spa [GT2.0] | 16 | 1100 Spider | Londerzeel | | DNA |
| 18.5.1958 | GP Spa [GT2.0] | 34 | 8V | Wicky | | DNA |
| 7.6.1958 | LCCC Oulton Park [Handicap A] | 1 | 600 | A. C. Hicks | J. H. Brown Ltd. | DNA |
| 15.6.1958 | Opatija [S2.0] | | 8V Zagato | Elio Copigno | | 6th |
| 22.6.1958 | M ČSR Ecce Homo [S1.1/S1.5] | 2 | 1100 | Ferenz Kozma | Maďarsko | DNA |
| 22.6.1958 | Vallelunga [GT1.3] | | 1100 Zagato | Paolo Galli | | 7th |
| 22.6.1958 | Vallelunga [GT1.3] | | 1100 Zagato | Teodoro Zeccoli | | 8th |
| 22.6.1958 | Vallelunga [GT500] | | 500 GT | Vittorio Santini | | 4th |
| 22.6.1958 | Vallelunga [GT500] | | 500 | Silvestro Durante | | 6th |
| 22.6.1958 | Vallelunga [GT2.6] | | 8V Zagato | Dore Leto di Priolo | | 2nd |
| 22.6.1958 | Vallelunga [GT500] | | 500 | Rossi C. Montecuccoli | | 3rd |
| 22.6.1958 | Vallelunga [GT2.6] | | 8V Zagato | Augusto Ciccolini | | 4th |
| 22.6.1958 | Vallelunga [GT2.6] | | 8V | Franco Canaparo | | 3rd |
| 29.6.1958 | Riverside [FM+GM+HM] | 1 | Special | Walker Edmiston | | DNF |
| 3.8.1958 | Giro delle Calabria | | 8V Zagato | Augusto Ciccolini | | 9th |
| 3.8.1958 | Giro delle Calabria | | 8V Zagato | Giancarlo Sala | | 7th |
| 17.8.1958 | SCCA National Montgomery [GP+HP+HM] | 00 | | William Buff | | 14th |
| 17.8.1958 | Zeltweg [GT1.3] | 56 | Stanguellini | Peter Klitsch | Ecurie Escort | ?th |
| 17.8.1958 | Zeltweg [GT+1.3] | 87 | 8V | Elio Zagato | Scuderia Ambrosiana | 3rd |
| 30.8.1958 | Preliminary Santa Barbara [GM+HM] | 12 | | Charles Gounis | | ?th |
| 31.8.1958 | Santa Barbara [EM+FM+GM+HM] | 12 | | Charles Gounis | | 17th |
| 7.9.1958 | Coppa Inter-Europa [GT+1.3] | | 8V Zagato | Augusto Ciccolini | | ?th |
| 7.9.1958 | Coppa Inter-Europa [GT+1.3] | | 8V Zagato | Lorenzo Bandini | | ?th |
| 7.9.1958 | Coppa Inter-Europa [GT+1.3] | | 8V Zagato | Giancarlo Sala | | ?th |
| 7.9.1958 | Coppa Inter-Europa [GT1.3] | | Zagato | Carlo Coppa | | 5th |
| 7.9.1958 | Coppa Inter-Europa [GT+1.3] | | 8V Zagato | Leto di Priolo | | ?th |
| 20.9.1958 | SCCA National Watkins Glen [FM+GM+HM] | 151 | | William Buff | | DNF |
| 27.9.1958 | Gardena [Main] | | Sedan | Jim Nieland | | DNA |
| 28.9.1958 | ICNSCC Ellensburg [FP+GP+HP+IP] | 25 | 600 | Paul Scott | | 20th |
| 28.9.1958 | ICNSCC Ellensburg [FP+GP+HP+IP] | 26 | 600 | Jack Larson | | 19th |
| 5.10.1958 | Innsbruck [GT1.3] | 37 | 600 GT | Giovanni Botter | Giovanni Botter | DNF |
| 5.10.1958 | Innsbruck [GT+1.6/S1.1] | 63 | 8V Zagato | Dore Leto di Priolo | Scuderia Ambrosiana | 7th |
| 12.10.1958 | Riverside [GM+HM+GP+HP] | 12 | | Charles Gounis | Charles Gounis | 19th |
| 26.10.1958 | Modena [GT] | | Zagato | Paolo Galli | | 4th |
| 26.10.1958 | Modena [GT] | | 1100 Zagato | Teodoro Zeccoli | | 5th |
| 2.11.1958 | SCCA National Palm Springs [CM+DM+EM+FM+GM+HM] | | | Mary McGee | S. Sugarmann | DNA |
| 4.11.1958 | Coppa Sant Ambroeus [GT500] | 103 | 500 | | | raced |
| 4.11.1958 | Coppa Sant Ambroeus [GT500] | 105 | 500 | | | raced |
| 4.11.1958 | Coppa Sant Ambroeus [GT500] | 106 | 500 | | | raced |
| 4.11.1958 | Coppa Sant Ambroeus [GT500] | 108 | 500 | | | raced |
| 4.11.1958 | Coppa Sant Ambroeus [GT750/GT1.1] | 147 | 1100 Zagato | Carlo Coppo | | 1st |
| 4.11.1958 | Coppa Sant Ambroeus [GT2.6/GT+2.6] | 189 | 8V Zagato | Elio Zagato | | 4th |
| 4.11.1958 | Coppa Sant Ambroeus [GT500] | | 500 | Giuliano Ronzoni | | 2nd |
| 4.11.1958 | Coppa Sant Ambroeus [GT500] | | 500 | M. Brandaglia | | 3rd |
| 4.11.1958 | Coppa Sant Ambroeus [GT750/GT1.1] | | 1100 Zagato | Carlo Pittoni | | 4th |
| 4.11.1958 | Coppa Sant Ambroeus [GT2.6/GT+2.6] | | 8V Zagato | Gianfranco Bonetto | | 5th |
| 4.11.1958 | Coppa Sant Ambroeus [GT500] | | 500 | Giorgio Pianta | | 5th |
| 4.11.1958 | Coppa Sant Ambroeus [GT500] | | 500 | G. Invernizzi | | 4th |
| 4.11.1958 | Coppa Sant Ambroeus [GT750/GT1.1] | | Monv | Giorgio Gnagnatti | | 11th |
| 15.11.1958 | 9 h Johannesburg | 24 | 1100 | Soll / Gerst | R. Soll | raced |
| 15.11.1958 | 9 h Johannesburg | 36 | 600 | Reeves / Serrurier | Lucy's Car Sales | raced |