Jeep Hurricane F-Head Specs: 3.126 x 4.374 in

Jeep Hurricane F-Head specs: 3.126 x 4.374 in (79.4 x 111.1 mm) bore and stroke, shared by all 3 versions. Displacement, compression and factory ratings.

At a glance

Displacement	134 ci
Cylinders	4
Bore	3.126"
Stroke	4.374"
Compression	7.5:1
Advertised power	60–75 hp
Years	1953–1971

Engines in this family

Engine	Displacement	Bore × Stroke	CR	HP
F4-134	134 ci	3.126" × 4.374"	7.5:1	72
L-134	134 ci	3.126" × 4.374"	—	60
F-134	134 ci	3.126" × 4.374"	—	72–75

Factory cars with a Hurricane F-Head

• Jeep CJ: 1953, 60 hp; 1953, 72 hp; 1954, 72 hp; 1955, 72 hp; 1956, 72 hp; 1957, 72 hp; 1958, 72 hp; 1959, 72 hp; 1960, 72 hp; 1961, 75 hp; 1962, 75 hp; 1963, 75 hp; 1964, 75 hp; 1965, 75 hp; 1966, 75 hp; 1967, 75 hp; 1968, 75 hp; 1969, 75 hp; 1970, 75 hp; 1971, 75 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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