Honda V12 engine

Honda has made a number of naturally-aspirated V12 engines designed for Formula One motor racing; starting with the 1.5-litre RA271E engine in 1964,[10][11] and ending with the 3.0-litre RA273E in 1968.[5][12] This would be followed by a 21-year hiatus, until Honda reintroduced the new 3.5-litre RA121E in 1991.[13] The RA121E would go down as the last V12 engine to win a Formula One World Championship.[14] Honda's last-ever V12 engine, the RA122E/B, raced in 1992.[15]

Honda V12 engine
Overview
Manufacturer	Honda
Designer	Yoshio Nakamura (1964-1968) Osamu Goto (1991-1992)
Production	1964–1968, 1991–1992
Layout
Configuration	60°-75° V12
Displacement	1.5–3.5 L (91.5–213.6 cu in)
Valvetrain	48-valve, DOHC, four-valves per cylinder[1][2][3]
Compression ratio	12.0:1-12.9:1[4]
Combustion
Fuel system	Electronic fuel injection
Fuel type	Gasoline
Cooling system	Water-cooled
Output
Power output	210–805 hp (157–600 kW; 213–816 PS)[5][6]
Torque output	110–370 lb⋅ft (149–502 N⋅m)[7][8]
Dimensions
Dry weight	120–160 kg (264.6–352.7 lb)[9]
Chronology
Predecessor	Honda RA16 engine
Successor	Honda RA6 hybrid engine