Jeep Vigilante Specs: 4.00 x 3.252 in

Jeep Vigilante specs: 4.00 x 3.252 in (101.6 x 82.6 mm) bore and stroke, shared by all 3 versions. Displacement, compression and factory ratings.

At a glance

Displacement	327 ci
Cylinders	8
Bore	4.000"
Stroke	3.252"
Compression	8.7:1
Advertised power	250–270 hp
Years	1965–1968

Engines in this family

Engine	Displacement	Bore × Stroke	CR	HP
AMC 327	327 ci	4" × 3.252"	8.7:1	250
Vigilante V-8	327 ci	4" × 3.252"	—	250
Vigilante V-8 4-bbl	327 ci	4" × 3.252"	—	270

Factory cars with a Vigilante

• Jeep Gladiator: 1965, 250 hp; 1966, 250 hp; 1967, 250 hp
• Jeep Wagoneer: 1965, 250 hp; 1966, 250 hp; 1966, 270 hp; 1967, 250 hp; 1967, 270 hp; 1968, 250 hp; 1968, 270 hp

What varies across the family

All are oversquare — bore larger than stroke, which favours revs over low-end torque.

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.

← All Jeep engines