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