 Rambai muchinyora ndima iyi - Nokuda kwe1954 Spanish Grand Prix Rosier akapinda muMaserati 250F itsva, uye akapedza ari panzvimbo yechinomwe. Muna Rosier akadzokera kunopinda motokari imwe bedzi nokuda kwake amene. Akasiya basa muMonacouye akapedza ari wechipfumbamwe muBelgium neNetherlands. Nokuti Rosier akapindazve muMaserati. Akatanga mwaka nechikwereti kuMonaco asati apedza wechisere muBelgium uye wechitanhatu muFrance. Pashure pokutanga ari wechimakumi maviri nemanomwe muBritain, Rosier akarega panzira yechimakumi maviri nematatu apo magetsi ake akakundikana. 1956 German Grand Prix, apo Rosier akapedza wechishanu akasimba, akaratidza kuva wokupedzisira Grand Prix pamusoro Ecurie Rosier nokuti Louis Rosier akafa kukuvara akawana mutsaona panguva Montlhéry njanji, kumaodzanyemba Paris, France musi 7 October 1956. 