Cadillac 331ci Specs: 3.813 x 3.625 in

Cadillac 331ci specs: 3.813 x 3.625 in (96.8 x 92.1 mm) bore and stroke. Displacement, compression and factory ratings, plus rod ratio.

At a glance

Displacement	331 ci
Cylinders	8
Bore	3.813"
Stroke	3.625"
Advertised power	210–270 hp
Years	1953–1955

This engine

Engine	Displacement	Bore × Stroke	CR	HP
Cadillac 331ci (1953–1955)	331 ci	3.8125" × 3.625"	—	210–270

Factory cars with a Cadillac 331ci

• Cadillac Eldorado: 1953, 210 hp; 1954, 230 hp; 1955, 270 hp

What varies across the family

This family is represented by a single engine in the database: 331 ci, 8 cylinders, a 3.8125" × 3.625" bore and stroke.

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 Cadillac engines