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The Honda RA273 was the Formula One racing car used by the Honda team in the 1966 and 1967 Formula One seasons, with its debut in the 1966 Italian Grand Prix.

The engine was re-designed from the RA272's 1,500cc V12 to a brand new 3,000cc V12 due to the change of regulations before the 1966 season. The new engine was designed by Shoichiro Irimajiri.

HONDA  RA273E

F1_Honda_RA273E (1966)

Type: RA273E (B-series)

Year: 1966-1968

Number of cylinders: 12

Configuration: 90° vee

Capacity: 2991

RPM: 11000

Power: 400 bhp