Jeep Tornado Specs: 3.339 x 4.374 in

Jeep Tornado specs: 3.339 x 4.374 in (84.8 x 111.1 mm) bore and stroke, shared by all 4 versions. Displacement, compression and factory ratings.

At a glance

Displacement	230 ci
Cylinders	6
Bore	3.339"
Stroke	4.374"
Compression	8.5:1
Advertised power	133–140 hp
Years	1963–1965

Engines in this family

Engine	Displacement	Bore × Stroke	CR	HP
6-230	230 ci	3.3386" × 4.374"	8.5:1	140
Tornado OHC 6	230 ci	3.3386" × 4.374"	—	140
Tornado-OHC	230 ci	3.3386" × 4.374"	—	140
Tornado-OHC low-comp	230 ci	3.3386" × 4.374"	—	133

Factory cars with a Tornado

• Jeep Gladiator: 1963, 140 hp; 1964, 140 hp; 1965, 140 hp
• Jeep Wagoneer: 1963, 140 hp; 1964, 133 hp; 1964, 140 hp; 1965, 140 hp

What varies across the family

All are undersquare — stroke larger than bore, favouring torque low in the range.

Each engine page carries rod ratio, mean piston speed, bore/stroke character and cylinder head specs where published, and links into the calculators with its dimensions already filled in.

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