Jeep Dauntless Engine Specs

Bore, stroke, displacement and compression for all 3 Jeep Dauntless engines, compared side by side. Plus rod ratio and head specs where published.

At a glance

Displacement	225–350 ci
Cylinders	6, 8
Bore	3.752–3.800"
Stroke	3.402–3.850"
Compression	9.0:1
Advertised power	160–230 hp
Years	1965–1971

Engines in this family

Engine	Displacement	Bore × Stroke	CR	HP
Dauntless 350	350 ci	3.8" × 3.85"	9:1	230
Buick 225	225 ci	3.752" × 3.4016"	9:1	160
Buick 225	225 ci	3.752" × 3.4016"	—	160

Factory cars with a Dauntless

• Jeep CJ: 1965, 160 hp; 1966, 160 hp; 1967, 160 hp; 1968, 160 hp; 1969, 160 hp; 1970, 160 hp; 1971, 160 hp
• Jeep Gladiator: 1968, 230 hp; 1969, 230 hp; 1970, 230 hp; 1971, 230 hp
• Jeep Wagoneer: 1968, 230 hp; 1969, 230 hp; 1970, 230 hp; 1971, 230 hp

What varies across the family

Both bore and stroke vary across the family, so these are separate castings rather than variations on one block.

2 of 3 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.

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