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
DesignerYoshio Nakamura (1964-1968)
Osamu Goto (1991-1992)
Production1964–1968, 1991–1992
Layout
Configuration60°-75° V12
Displacement1.5 L (1,495 cc)
3.0 L (2,993 cc)
3.5 L (3,497 cc)
3.5 L (3,496 cc)
Cylinder bore58.1 mm (2.3 in)
78 mm (3.1 in)
86.5 mm (3.4 in)
88 mm (3.5 in)
Piston stroke47 mm (1.9 in)
52.2 mm (2.1 in)
49.6 mm (2.0 in)
47.9 mm (1.9 in)
Valvetrain48-valve, DOHC, four-valves per cylinder[1][2][3]
Compression ratio12.0:1-12.9:1[4]
Combustion
Fuel systemCarburetor
Electronic fuel injection
Fuel typeGasoline
Cooling systemWater-cooled
Output
Power output210–805 hp (157–600 kW; 213–816 PS)[5][6]
Torque output110–370 lb⋅ft (149–502 N⋅m)[7][8]
Dimensions
Dry weight120–160 kg (264.6–352.7 lb)[9]
Chronology
PredecessorHonda RA16 engine
SuccessorHonda V10 engine
Honda RA6 hybrid engine

Applications

Grand Prix engine results

References
  1. "F1: Honda's first Formula 1 engine, almost 50 years ago (+video) | Car News | Auto123". auto123.com.
  2. "1965 Honda RA272". conceptcarz.com.
  3. "Honda RA271/272 1.5 Litre V12 1964/5 GP Cars…". December 12, 2014.
  4. "Specifications of 50 famous racing engines up to 1994 - Page 17 - F1technical.net". www.f1technical.net.
  5. "Engine Honda". Statsf1.com.
  6. "Honda Global | Formula One Entry: The Initial Phase / 1964". global.honda.
  7. "1990's F1 Engine Torque graphs - F1technical.net". www.f1technical.net.
  8. "Spicer Horsepower and Torque Calculator". spicerparts.com.
  9. "Summary of Honda Formula One Engine in Third-Era Activities" (PDF). F1-forecast.com. Retrieved 10 November 2021.
  10. "When Honda Brought a 1.5-Liter V-12 to Formula 1". Roadandtrack.com. 2 October 2020.
  11. "F1: Honda's first Formula 1 engine, almost 50 years ago (+video) | Car News". Auto123.com.
  12. "1967 Honda RA300 F1 Car - 3.0L V12 Engine Sound!". YouTube. Retrieved 10 November 2021.
  13. "1991 McLaren MP4/6 F1 Sound - Honda 3.5 V12 Engine Screams at Goodwood". YouTube. Retrieved 10 November 2021.
  14. "1991 McLaren MP4/6 Honda - Images, Specifications and Information". Ultimatecarpage.com. Retrieved 10 December 2019.
  15. Engineering, Racecar (June 25, 2020). "Natural Aspirations".
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