Rubuta ci gaba don wannan sakin layi - Har ila yau, don 1951 B. Bira ya canza '49-spec 4CLT don karɓar injin OSCA V12 mai ƙarfi, mai ɗorewa. Wannan injin ya samo asali ne a kusa. Tare da shi Bira ya lashe tseren Goodwood a farkon kakar, amma a cikin bayyanarsa ta Gasar Cin Kofin Duniya kawai, a gasar Grand Prix ta Spain ta 1951
, ya yi ritaya a zagaye na farko.