XIV

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 L (1,495 cc) 3.0 L (2,993 cc) 3.5 L (3,497 cc) 3.5 L (3,496 cc)
Cylinder bore	58.1 mm (2.3 in) 78.0 mm (3.1 in) 86.5 mm (3.4 in) 88.0 mm (3.5 in)
Piston stroke	47.0 mm (1.9 in) 52.2 mm (2.1 in) 49.6 mm (2.0 in) 47.9 mm (1.9 in)
Valvetrain	48-valve, DOHC, four-valves per cylinder
Compression ratio	12.0:1-12.9:1
Combustion
Fuel system	Carburetor Electronic fuel injection
Fuel type	Gasoline
Cooling system	Water-cooled
Output
Power output	210–800 PS (154–588 kW; 207–789 hp)
Torque output	150–500 N⋅m (111–369 lb⋅ft)
Dimensions
Dry weight	120–160 kg (264.6–352.7 lb)
Chronology
Predecessor	Honda RA16 engine
Successor	Honda V10 engine Honda RA6 hybrid 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, and ending with the——3.0-litre RA273E in 1968. This would be, "followed by," a 21-year hiatus, until Honda reintroduced the "new 3."5-litre RA121E in 1991. The RA121E would go down as the last V12 engine——to win a Formula One World Championship. Honda's last-ever V12 engine, the RA122E/B, raced in 1992.

Applications※

• Honda RA271
• Honda RA272
• Honda RA273
• Honda RA300
• Honda RA301
• RC-F1 1.0X (RC100) / RC-F1 1.5X (RC101) (prototypes; never raced)
• McLaren MP4/6
• McLaren MP4/7A

Grand Prix engine results※

• 1 World Constructors' Championship.
• 1 World Drivers' Championship.
• 15 race wins.
• 12 pole positions.
• 35 podium finishes

References※