Jeep Tornado engine

The Jeep Tornado engine was the first post-World War II U.S.-designed mass-produced overhead cam (OHC) automobile engine. The 230.5 cu in (3.78 L) hemi-headed straight-six was introduced in mid-year 1962, and replaced the flathead "6-226" Willys Super Hurricane that was in use since 1954.

Jeep Tornado
Overview
Manufacturer
Also called
  • Torino (IKA)
  • Tornado Jet (IKA)
  • Tornado Interceptor (Renault)
Production1962-1973
Layout
Configurationstraight six
Displacement230.51 cu in (3,777 cc)
Cylinder bore3+1132 in (84.93 mm)
Piston stroke4+38 in (111.13 mm)
Cylinder block materialIron
Cylinder head materialIron
ValvetrainSOHC
Compression ratio8.5:1 or 7.5:1
Output
Power output
  • 140 hp (104 kW; 142 PS) at 4000 rpm (high compression) or
  • 133 hp (99 kW; 135 PS) at 4000 rpm (low compression)
Specific power
  • 0.61 hp/in³ or
  • 0.58 hp/in³
Torque output
  • 210 lb⋅ft (285 N⋅m) at 1750 rpm or
  • 199 lb⋅ft (270 N⋅m) at 2400 rpm
Chronology
PredecessorWillys Super Hurricane
SuccessorAMC straight-6 engine

The Tornado engine was also manufactured in Argentina by Industrias Kaiser Argentina (IKA) from 1965 until 1973.

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