| 29.5.1955 | Eifelrennen Nürburgring | 4 | 118 LM Scaglietti Spyder | Giuseppe Farina | Automobili Ferrari | 5th |
| 29.5.1955 | Eifelrennen Nürburgring | 6 | 750 Monza | Masten Gregory | Automobili Ferrari | 3rd |
| 29.5.1955 | 12 h Hyères | 6 | 750 Monza | Canonica / Munaron | | 1st |
| 29.5.1955 | Eifelrennen Nürburgring | 7 | 750 Monza | Gunnar Carlsson | Tore Bjurström | 7th |
| 29.5.1955 | Eifelrennen Nürburgring | 8 | 375 MM | Valdemar Stener | Tore Bjurström | DNA |
| 29.5.1955 | 12 h Hyères | 10 | 500 Mondial Scaglietti Spyder Series II | Munaron / Maret | Gino Munaron | DNF |
| 29.5.1955 | Eifelrennen Nürburgring | 10 | 750 Monza | Jacques Jonneret | Ecurie 'La Meute' | DNA |
| 29.5.1955 | Santa Barbara [S+1.5] | 11 | 750 Monza Scaglietti Spyder | John von Neumann | John von Neumann | DNF |
| 29.5.1955 | Supercortemaggiore | 14 | 750 Monza Scaglietti Spyder | Trintignant / Taruffi | Scuderia Ferrari | DNF |
| 29.5.1955 | GP des Frontières | 14 | 750 Monza | André Canonica | | DNA |
| 29.5.1955 | Supercortemaggiore | 18 | 500 Mondial Scaglietti Spyder | Cornacchia / Rossi | | 10th |
| 29.5.1955 | Supercortemaggiore | 20 | 750 Monza | Landi / Cornacchia | | 4th |
| 29.5.1955 | Supercortemaggiore | 22 | 750 Monza Scaglietti | Pinzero / Pinzero | | 9th |
| 29.5.1955 | Supercortemaggiore | 24 | 225 Export Vignale Coupe | Moroni / Gaboardi | | DNF |
| 29.5.1955 | Supercortemaggiore | 26 | 250 MM | Lualdi / Randaccio | | NC |
| 29.5.1955 | Supercortemaggiore | 32 | 500 Mondial Scaglietti Spyder Series II | Leto di Priolo / Leto di Priolo | Leto Di Priolo | DNF |
| 29.5.1955 | Supercortemaggiore | 34 | 166 S Spyder Corsa Passo Corto | Guarducci / Guarducci | | DNF |
| 29.5.1955 | Supercortemaggiore | 36 | 750 Monza Scaglietti | Piotti / Cortese | | 5th |
| 29.5.1955 | GP des Frontières | 38 | | Bernard Bianchi | | DNA |
| 29.5.1955 | GP des Frontières | 40 | 166 MM/53 Spyder | Jacques Herzet | Ecurie Francorchamps | 4th |
| 29.5.1955 | Supercortemaggiore | 40 | 212 Inter Vignale Coupe | Cocconcelli / Casarotto | | NC |
| 29.5.1955 | Supercortemaggiore | 42 | 500 Mondial Scaglietti Spyder Series II | Della Favera / Buticchi | Mario Della Favera | DNF |
| 29.5.1955 | Supercortemaggiore | 44 | 750 Monza Scaglietti Spyder | Schell / Carini | | DNF |
| 29.5.1955 | Supercortemaggiore | 46 | 750 Monza | Musitelli / Luglio | | NC |
| 29.5.1955 | Supercortemaggiore | 48 | | Compostella / Simonetta | | NC |
| 29.5.1955 | Supercortemaggiore | 50 | 750 Monza | Bornigia / Mancini | Tony Parravano | NC |
| 29.5.1955 | Supercortemaggiore | 52 | 750 Monza Scaglietti Spyder | Lucas / da Silva Ramos | | DNF |
| 29.5.1955 | Supercortemaggiore | 54 | 166 MM/53 Autodromo Spyder | Bettiol / Benzoni | | DNF |
| 29.5.1955 | Supercortemaggiore | 56 | 500 Mondial Scaglietti | Taramazzo / Anselmi | Luigi Taramazzo | 8th |
| 29.5.1955 | Supercortemaggiore | 58 | 250 Monza | "Kammamuri" / Lubich | | DNF |
| 29.5.1955 | Santa Barbara [S+1.5] | 76 | 750 Monza Scaglietti Spyder | Ernie McAfee | Bill Doheny | 1st |
| 29.5.1955 | Supercortemaggiore | | 750 Monza | Ascari / Castellotti | Scuderia Ferrari | unused |
| 29.5.1955 | GP Tangier [2.0/+2.0] | | 500 Mondial | Dustaritz | | 7th |
| 29.5.1955 | Santa Barbara [S+1.5] | | 500 Mondial | Pringle | J. von Neumann | 4th |
| 30.5.1955 | Iowa [BM+CM+DM+EM+CP+DP+EP] | 5 | 212 Export | John Shakespeare | John Shakespeare | DNA |
| 30.5.1955 | Iowa [BM+CM+DM+EM+CP+DP+EP] | 6 | 225 S | David Biggs | Dave Biggs | DNA |
| 30.5.1955 | GP Bougie | | 750 Monza Scaglietti Spyder | Louis Rosier | | 1st |
| 30.5.1955 | GP Bougie | | Berlinetta | Giraud | | DNF |
| 5.6.1955 | Santa Rosa [S+1.5] | 26 | 750 Monza Scaglietti Spyder | Sterling Edwards | | DNF |
| 5.6.1955 | GP Mugello | 96 | 500 Mondial Scaglietti Spyder Series II | Mario Della Favera | | 3rd |
| 5.6.1955 | Santa Rosa [S+1.5] | 103 | 375 Plus | Jack McAfee | Tony Parravano | DNS |
| 5.6.1955 | Santa Rosa [S+1.5] | 106 | 340 Mexico Special | George Sawyer | | raced |
| 5.6.1955 | Santa Rosa [S+1.5] | 107 | 750 Monza Scaglietti Spyder | John von Neumann | John von Neumann | 1st |
| 5.6.1955 | GP Mugello | 122 | 750 Monza | Luigi Piotti | | DNS |
| 5.6.1955 | GP Mugello | 126 | 750 Monza | Luigi Bordonaro | | 20th |
| 5.6.1955 | GP Mugello | | 750 Monza | Umberto Maglioli | | 1st |
| 5.6.1955 | GP Mugello | | | Siro Sbraci | | 11th |
| 12.6.1955 | 24 h Le Mans | 3 | 121 LM Scaglietti Spyder | Maglioli / Hill | Scuderia Ferrari | DNF |
| 12.6.1955 | 24 h Le Mans | 4 | 121 LM Scaglietti Spyder | Castellotti / Marzotto | Scuderia Ferrari | DNF |
| 12.6.1955 | 24 h Le Mans | 5 | 121 LM Scaglietti Spyder | Trintignant / Schell | Scuderia Ferrari | DNF |
| 12.6.1955 | 24 h Le Mans | 12 | 750 Monza Scaglietti Spyder | "Heldé" / Lucas | Heldé | DNF |
| 12.6.1955 | 24 h Le Mans | 14 | 750 Monza Scaglietti Spyder | "Sparken" / Gregory | Mike Sparken | DNF |
| 12.6.1955 | 24 h Le Mans | 68 | 750 Monza | Yves Giraud-Cabantous | Yves Giraud-Cabantous | DNA |
| 18.6.1955 | Preliminary Hansen Dam [Modified +3.0] | 1 | 375 MM | Tom Bamford | | 2nd |
| 18.6.1955 | Preliminary Hansen Dam [Modified 3.0] | 16 | 750 Monza Scaglietti Spyder | Sterling Edwards | Sterling Edwards | DNA |
| 18.6.1955 | GP Edenvale | 40 | 500 Mondial | Jim Pauley | Ecurie 'Chacun a son gout' | 10th |
| 18.6.1955 | Edenvale [Formula Libre] | 40 | 500 Mondial | Jim Pauley | Ecurie 'Chacun a son gout' | 1st |
| 18.6.1955 | Edenvale [Sports] | 40 | 500 Mondial | Jim Pauley | Ecurie 'Chacun a son gout' | 1st |
| 18.6.1955 | Edenvale [S3.0] | 40 | 500 Mondial | Jim Pauley | Ecurie 'Chacun a son gout' | 3rd |
| 18.6.1955 | Preliminary Hansen Dam [Modified 3.0] | 76 | 750 Monza Scaglietti Spyder | Ernie McAfee | Wm. Doheny | 1st |
| 19.6.1955 | Hansen Dam [S+1.5] | 1 | 375 MM | Tom Bamford | | 2nd |
| 19.6.1955 | Lawrenceville [BM+CM+DM+EM+FM+CP+DP+EP] | 6 | 340 MM Vignale Spyder | Ed Lunken | Edmund Lunken | 3rd |
| 19.6.1955 | Preliminary Lawrenceville [BM+CM+DM+EM+FM+CP+DP+EP] | 6 | 340 MM Vignale Spyder | Ed Lunken | Edmund Lunken | ?th |
| 19.6.1955 | Lawrenceville [BM+CM+DM+EM+FM+CP+DP+EP] | 16 | 225 S | David Biggs | David Biggs | ?th |
| 19.6.1955 | Preliminary Lawrenceville [BM+CM+DM+EM+FM+CP+DP+EP] | 16 | 225 S | David Biggs | David Biggs | ?th |
| 19.6.1955 | Hansen Dam [S+1.5] | 16 | 750 Monza Scaglietti Spyder | Sterling Edwards | Sterling Edwards | DNA |
| 19.6.1955 | Preliminary Lawrenceville [BM+CM+DM+EM+FM+CP+DP+EP] | 22 | 250 MM | Richard Lyeth | | ?th |
| 19.6.1955 | Lawrenceville [BM+CM+DM+EM+FM+CP+DP+EP] | 22 | 250 MM | Lyeth | | ?th |
| 19.6.1955 | Lawrenceville [BM+CM+DM+EM+FM+CP+DP+EP] | 45 | 212 Export | John Shakespeare | J. Shakespeare | ?th |
| 19.6.1955 | Preliminary Lawrenceville [BM+CM+DM+EM+FM+CP+DP+EP] | 45 | 212 Export | John Shakespeare | J. Shakespeare | ?th |
| 19.6.1955 | GP Shell Imola | 54 | 500 Mondial | João Rozende Dos Santos | | DNS |
| 19.6.1955 | GP Shell Imola | 56 | 500 Mondial | Piero Taruffi | | DNF |
| 19.6.1955 | Lawrenceville [BM+CM+DM+EM+FM+CP+DP+EP] | 57 | 375 MM | Dale Duncan | Dale Duncan | 2nd |
| 19.6.1955 | Preliminary Lawrenceville [BM+CM+DM+EM+FM+CP+DP+EP] | 57 | 375 MM | Dale Duncan | Dale Duncan | 1st |
| 19.6.1955 | GP Shell Imola | 58 | 750 Monza Scaglietti Spyder | Umberto Maglioli | Scuderia Ferrari | 2nd |
| 19.6.1955 | GP Shell Imola | 60 | 500 Mondial | Harry Schell | Gastone Crepaldi | 3rd |
| 19.6.1955 | GP Shell Imola | 64 | 500 Mondial | Luigi Taramazzo | Luigi Taramazzo | 6th |
| 19.6.1955 | GP Shell Imola | 66 | 500 Mondial Scaglietti Spyder Series II | Gino Munaron | Gino Munaron | 5th |
| 19.6.1955 | Lawrenceville [BM+CM+DM+EM+FM+CP+DP+EP] | 71 | 375 Plus | Howard Hively | Howard Hively | 1st |
| 19.6.1955 | Preliminary Lawrenceville [BM+CM+DM+EM+FM+CP+DP+EP] | 71 | 375 Plus | Howard Hively | Howard Hively | 3rd |
| 19.6.1955 | Lawrenceville [BM+CM+DM+EM+FM+CP+DP+EP] | 71T | 250 MM | Howard Hively | Howard Hively | unused |
| 19.6.1955 | Preliminary Lawrenceville [BM+CM+DM+EM+FM+CP+DP+EP] | 71T | 250 MM | Howard Hively | Howard Hively | unused |
| 19.6.1955 | Hansen Dam [S+1.5] | 76 | 750 Monza Scaglietti Spyder | Ernie McAfee | Wm. Doheny | 1st |
| 19.6.1955 | Preliminary Lawrenceville [BM+CM+DM+EM+FM+CP+DP+EP] | 77 | 500 Mondial | Robert Magenheimer | Robt. Tappan | ?th |
| 19.6.1955 | Lawrenceville [BM+CM+DM+EM+FM+CP+DP+EP] | 77 | 500 Mondial | Robert Magenheimer | Robt. Tappan | ?th |
| 19.6.1955 | Lawrenceville [BM+CM+DM+EM+FM+CP+DP+EP] | 110 | 375 MM | George Roberts | John Shakespeare | 4th |
| 19.6.1955 | Preliminary Lawrenceville [BM+CM+DM+EM+FM+CP+DP+EP] | 110 | 375 MM | Lloyd Barton | John Shakespeare | 2nd |
| 19.6.1955 | Preliminary Lawrenceville [BM+CM+DM+EM+FM+CP+DP+EP] | 111 | 250 MM | John Quackenbush | J. Quackenbush | ?th |
| 19.6.1955 | Lawrenceville [BM+CM+DM+EM+FM+CP+DP+EP] | 711 | 250 MM | John Quackenbush | | ?th |
| 19.6.1955 | GP Tunisia | | 750 Monza | Luigi Bordonaro | Luigi Bordonaro | 2nd |
| 19.6.1955 | GP Tunisia | | 500 Mondial Scaglietti Spyder Series II | Antonio Pucci | | 5th |
| 19.6.1955 | GP Tunisia | | 750 Monza | Luigi Piotti | Luigi Piotti | 1st |
| 19.6.1955 | GP Shell Imola | | 500 Mondial Scaglietti Spyder Series II | Carlo Leto di Priolo | | DNA |
| 26.6.1955 | GP Portugal | 1 | 735 Monza Pinin Farina Spyder | Herbert Mackay-Fraser | Herbert McKay Frazer | DNS |
| 26.6.1955 | GP Portugal | 10 | 750 Monza Scaglietti Spyder Series I | Casimiro de Oliveira | Casimiro D' Oliveiro | DNF |
| 26.6.1955 | GP Portugal | 18 | 750 Monza | Masten Gregory | | 2nd |
| 26.6.1955 | GP Caserta [S2.0] | 28 | 500 Mondial Scaglietti Spyder Series II | Gino Munaron | | 5th |
| 26.6.1955 | GP Portugal | | 750 Monza Scaglietti Spyder | Jacques Swaters | Ecurie Francorchamps | DNS |
| 26.6.1955 | GP Caserta [S2.0] | | 500 Mondial | Carmine Diaferia | | 9th |
| 26.6.1955 | GP Caserta [S2.0] | | 500 Mondial | Guido Mancini | | 4th |