American Motors 401ci Specs: 4.165 x 3.68 in

American Motors 401ci specs: 4.165 x 3.68 in (105.8 x 93.5 mm) bore and stroke. Displacement, compression and factory ratings, plus rod ratio.

At a glance

Displacement	401 ci
Cylinders	8
Bore	4.165"
Stroke	3.680"
Advertised power	235–330 hp
Years	1971–1974

This engine

Engine	Displacement	Bore × Stroke	CR	HP
American Motors 401ci (1971–1974)	401 ci	4.165" × 3.68"	—	235–330

Factory cars with a American Motors 401ci

• AMC Javelin: 1971, 330 hp; 1972, 255 hp; 1973, 255 hp; 1974, 235 hp

What varies across the family

This family is represented by a single engine in the database: 401 ci, 8 cylinders, a 4.165" × 3.68" 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 American Motors engines