12-cylinder engine was placed behind a road-going driver in the 365GT4 BB. Ferrari produced the 250 P in 1963 in response to the FIA introducing a prototype
GTB/4 1966–1976 4390 cc – 365, 365 GTC/4, Daytona 1969–1970 2991 cc – Ferrari 312 P 1976–1984 4823 cc – 400 1985–1989 4943 cc – 412 Lampredi (60° V angle)