| Honda V12 engine | |
|---|---|
 | |
| Overview | |
| Manufacturer |  Honda |
| Designer | Yoshio Nakamura (1964-1968) Osamu Goto (1991-1992) |
| Production | 1964–1968, 1991–1992 |
| Layout | |
| Configuration | 1964–1968: 60°-90° V12 1991–1992: 60°-75° V12 |
| Displacement |
|
| Cylinder bore |
|
| Piston stroke |
|
| Valvetrain | 48-valve, DOHC, four-valves per cylinder [1] [2] [3] |
| Compression ratio | 12.0:1-12.9:1 [4] |
| 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) [5] [6] |
| Torque output | 150–500 N⋅m (111–369 lb⋅ft) [7] [8] |
| Dimensions | |
| Dry weight | 120–160 kg (264.6–352.7 lb) [9] |
| Chronology | |
| Predecessor | Honda RA16 engine |
| Successor | Honda V10 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]