| 5.6.1955 | GP Mugello | | A6GCS/53 | Lopez | | DNF |
| 11.6.1955 | National Kirkistown [Open Handicap] | | | Sidney Durbridge | | 3rd |
| 12.6.1955 | 24 h Le Mans | 15 | 300S | Mières / Perdisa | Officine Alfieri Maserati | DNF |
| 12.6.1955 | 24 h Le Mans | 16 | 300S | Valenzano / Musso | Officine Alfieri Maserati | DNF |
| 12.6.1955 | 24 h Le Mans | 31 | A6GCS/53 | Tomasi / Giardini | Officine Alfieri Maserati | DNF |
| 12.6.1955 | 24 h Le Mans | 44 | 150S | | Officine Alfieri Maserati | DNA |
| 12.6.1955 | 24 h Le Mans | 71 | 150S | | Officine Alfieri Maserati | DNA |
| 19.6.1955 | GP Shell Imola | 2 | 200S | Franco Bordoni | Officine Alfieri Maserati | DNF |
| 19.6.1955 | GP Shell Imola | 4 | A6GCS/53 | Carlo Tomasi | | DNF |
| 19.6.1955 | GP Shell Imola | 6 | A6GCS | Cesare Perdisa | Officine Alfieri Maserati | 1st |
| 19.6.1955 | GP Shell Imola | 8 | A6GCS/53 | Luigi Bellucci | | 8th |
| 19.6.1955 | GP Shell Imola | 10 | A6GCS/53 | Alberico Cacciari | | 9th |
| 19.6.1955 | GP Shell Imola | 12 | A6GCS/53 | Maria Teresa de Filippis | | DNF |
| 19.6.1955 | GP Shell Imola | 36 | A6GCS | Azzurro Manzini | | 4th |
| 19.6.1955 | GP Shell Imola | 46 | 150S | Giorgio Scarlatti | | 7th |
| 19.6.1955 | GP Shell Imola | 48 | A6GCS | Giuseppe Musso | | DNF |
| 26.6.1955 | GP Portugal | 7 | 300S | Jean Behra | Maserati | 1st |
| 26.6.1955 | GP Portugal | 8 | A6GCS/53 | Luigi Musso | | DNF |
| 26.6.1955 | GP Caserta [S2.0] | 12 | A6GCS/53 | Gaetano Starrabba | | 7th |
| 26.6.1955 | GP Caserta [S2.0] | | A6GCS | Giorgio Scarlatti | | 3rd |
| 26.6.1955 | GP Caserta [S2.0] | | A6GCS/53 | Giuseppe Musso | | 2nd |
| 26.6.1955 | GP Caserta [S2.0] | | A6GCS | Cesare Perdisa | | DNF |
| 26.6.1955 | GP Caserta [S2.0] | | A6GCS/53 | Enzo Lopez | | 8th |
| 26.6.1955 | GP Portugal | | 300S | Emmanuel de Graffenried | | DNA |
| 26.6.1955 | GP Caserta [S2.0] | | A6GCS/53 | Luigi Bellucci | | 1st |
| 26.6.1955 | GP Caserta [S2.0] | | A6GCS | Maria Teresa de Filippis | | 6th |
| 3.7.1955 | Milwaukee [BM+CM+DM+EM+CP+DP+EP] | 32 | A6GCS/53 | Tom Friedmann | | ?th |
| 4.7.1955 | Preliminary Beverly [BM+CM+DM+EM] | 1 | 300S | Bill Spear | | DNF |
| 4.7.1955 | SCCA National Beverly [BM+CM+DM+EM+CP] | 1 | 300S | Spear / Bennett | | 5th |
| 4.7.1955 | Preliminary Beverly [BM+CM+DM+EM] | 7 | V8RI | Phil Cade | | 16th |
| 4.7.1955 | SCCA National Beverly [BM+CM+DM+EM+CP] | 21 | 300S | Bill Lloyd | Bill Lloyd | 4th |
| 4.7.1955 | Preliminary Beverly [BM+CM+DM+EM] | 21 | 300S | Bill Lloyd | Bill Lloyd | 3rd |
| 4.7.1955 | SCCA National Beverly [BM+CM+DM+EM+CP] | 98 | 300S | Cunningham, Jr. / Johnston | Briggs Cunningham | 6th |
| 4.7.1955 | Preliminary Beverly [BM+CM+DM+EM] | 98 | 300S | Briggs Cunningham | Briggs Cunningham | 6th |
| 9.7.1955 | Leinster Trophy | | | Sidney Durbridge | | raced |
| 10.7.1955 | Coppa d'Oro delle Dolomiti | 129 | A6GCS/53 | Fedele Lampertico | | DNF |
| 10.7.1955 | Coppa d'Oro delle Dolomiti | 136 | A6GCS/53 | Piero Valenzano | | DNF |
| 10.7.1955 | Coppa d'Oro delle Dolomiti | 137 | A6GCS | Giuseppe Musso | | DNF |
| 10.7.1955 | Coppa d'Oro delle Dolomiti | 139 | A6GCS/53 | Francesco Giardini | | DNF |
| 10.7.1955 | Coppa d'Oro delle Dolomiti | 142 | A6GCS/53 | Gino Valenzano | | DNF |
| 10.7.1955 | Coppa d'Oro delle Dolomiti | 143 | A6GCS | Silvio Cesarin | | 24th |
| 10.7.1955 | GP Independenzia | | A6GCS/53 | Ricardo Grandio | | 5th |
| 17.7.1955 | Circuito di Reggio Calabria [S2.0] | | | Luigi Musso | | 5th |
| 17.7.1955 | Circuito di Reggio Calabria [Handicap] | | A6GCS | Luigi Bellucci | | 2nd |
| 17.7.1955 | Circuito di Reggio Calabria [S2.0] | | A6GCS/53 | Francesco Giardini | | 2nd |
| 17.7.1955 | Circuito di Reggio Calabria [S2.0] | | A6GCS | Luigi Bellucci | | 1st |
| 24.7.1955 | Circuito de Lisboa | 7 | 300S | Emmanuel de Graffenried | | 2nd |
| 24.7.1955 | Circuito de Lisboa | 8 | 300S | Benoît Musy | | DNF |
| 24.7.1955 | 10 h Messina | | A6GCS/53 | de Filippis / Musitelli | | 3rd |
| 24.7.1955 | 10 h Messina | | 300S | Mières / Bordoni | Maserati | 4th |
| 24.7.1955 | 10 h Messina | | 300S | Musso / Perdisa | Officine Alfieri Maserati | DNF |
| 31.7.1955 | SCCA National Seafair [BM+CM+DM+EM] | 113 | A6GCS | Bob Gillespie | R. G. Gillespie | 12th |
| 1.8.1955 | Brands Hatch International [S+1.9] | 50 | A6GCS | Georges Houel | G. Houel | DNA |
| 7.8.1955 | GP Sverige | 8 | 300S | Benoît Musy | Benoit Musy | 5th |
| 7.8.1955 | GP Sverige | 11 | 300S | Jean Behra | Scuderia Maserati | 4th |
| 7.8.1955 | GP Sverige [Production/GT+2.0] | 24 | A6GCS/53 | André Loëns | André Loëns | 5th |
| 13.8.1955 | Edenvale [S3.0] | 64 | 300S | Bill Lloyd | | DNA |
| 13.8.1955 | 1 h Edenvale [Le Mans Handicap] | 64 | 300S | Bill Lloyd | | DNA |
| 13.8.1955 | 1 h Edenvale [Le Mans Handicap] | 109 | | W. Friedman | | DNA |
| 13.8.1955 | Edenvale [S2.0] | 109 | | W. Friedman | | DNA |
| 13.8.1955 | Snetterton International [Formula Libre] | 127 | 250F | Roy Salvadori | Gilby Engineering | 2nd |
| 14.8.1955 | Kanonloppet [Sports] | 1 | 300S | Benoît Musy | | 2nd |
| 14.8.1955 | Kanonloppet [Production/GT+2.0] | 14 | A6GCS/53 | André Loëns | | 3rd |
| 21.8.1955 | Roskilde Ring [PS2.0] | 27 | A6GCS/53 | André Loëns | | DNA |
| 21.8.1955 | Giro delle Calabria | 852 | A6GCS | Luigi Bellucci | Maserati | 1st |
| 21.8.1955 | Giro delle Calabria | | A6GCS/53 | Gaetano Starrabba | | DNF |
| 21.8.1955 | Giro delle Calabria | | | Roberto Lippi | | DNF |
| 21.8.1955 | Giro delle Calabria | | | Luigi Musso | Maserati | DNF |
| 21.8.1955 | Giro delle Calabria | | A6GCS/53 | Francesco Giardini | Maserati | DNF |
| 21.8.1955 | Giro delle Calabria | | | Luigi Olivari | | DNF |
| 21.8.1955 | Giro delle Calabria | | A6GCS/53 | Maria Teresa de Filippis | | 4th |
| 21.8.1955 | Giro delle Calabria | | A6GCS/53 | Enzo Lopez | | 11th |
| 21.8.1955 | Giro delle Calabria | | | Amelio Garavaglia | | DNF |
| 27.8.1955 | Oulton Park International | 24 | A6GCS | Azzurro Manzini | A. Manzini | DNF |
| 27.8.1955 | Oulton Park International | 60 | 300S | Benoît Musy | B. Musy | DNS |
| 27.8.1955 | Oulton Park International | | 150S | Jacques Péron | Jacques Péron | DNA |
| 28.8.1955 | 500 km Nürburgring | 16 | 150S | Jean Behra | Officine Alfieri Maserati | 1st |
| 28.8.1955 | GP Pergusa | 46 | A6GCS/53 | Gaetano Starrabba | | raced |
| 28.8.1955 | National Buenos Aires | | A6GCS/53 | Ricardo Grandio | | 4th |
| 28.8.1955 | GP Pergusa | | A6GCS/53 | Maria Teresa de Filippis | | 2nd |
| 28.8.1955 | GP Pergusa | | A6GCS | Franco Bordoni | | 1st |
| 3.9.1955 | Aintree International | 72 | 300S | Robert Jenny | R. Jenny | 6th |
| 4.9.1955 | SCCA National Thompson [BM+UR] | 7 | V8RI | Phil Cade | | 3rd |
| 4.9.1955 | Finale Thompson [All Classes] | 21 | 300S | John Gordon Bennett | Bill Lloyd | 1st |
| 4.9.1955 | SCCA National Thompson [CM+DM] | 21 | 300S | Bill Lloyd | William Lloyd | 1st |
| 4.9.1955 | Skarpnäcksloppet [PS2.0/PS+2.0] | 34 | A6GCS/53 | André Loëns | | 1st |
| 5.9.1955 | Preliminary Kansas City [BM+CM+DM+EM+FM] | 32 | A6GCS/53 | Tom Friedmann | | 6th |
| 5.9.1955 | SCCA National Kansas City [BM+CM+DM+EM+FM] | 32 | A6GCS/53 | Tom Friedmann | | 5th |
| 5.9.1955 | SCCA National Kansas City [BM+CM+DM+EM+FM] | 66 | | Bobby Burns | | 13th |
| 5.9.1955 | Preliminary Kansas City [BM+CM+DM+EM+FM] | 66 | | Bobby Burns | | 16th |
| 5.9.1955 | SCCA National Kansas City [BM+CM+DM+EM+FM] | 117 | | Roy Cherryhomes | | 14th |
| 5.9.1955 | Preliminary Kansas City [BM+CM+DM+EM+FM] | 117 | | Roy Cherryhomes | | 17th |
| 10.9.1955 | SCCA National Road America [EM+FM] | 7 | A6GCS | Ted Boynton | Ted Boynton | 6th |
| 10.9.1955 | SCCA National Road America [EM+FM] | 132 | A6GCS/53 | Tom Friedmann | Thomas A. Friedman | DNA |
| 11.9.1955 | SCCA National Road America [BM+CM+DM] | 10 | 300S | Bill Spear | William C. Spear | 5th |
| 11.9.1955 | SCCA National Road America [BM+CM+DM] | 16 | 300S | | William Lloyd | DNF |
| 11.9.1955 | SCCA National Road America [BM+CM+DM] | 59 | 300S | John Gordon Bennett | Briggs Cunningham | 4th |
| 17.9.1955 | GP Watkins Glen | 14 | A6GCS | Ted Boynton | Ted Boynton | DNA |
| 17.9.1955 | GP Watkins Glen | 59 | 300S | John Gordon Bennett | Briggs S. Cunningham | DNF |
| 17.9.1955 | GP Watkins Glen | 182 | A6GCS/53 | Tom Friedmann | Thomas A. Friedmann | DNA |