Pontiac 252ci Specs: 3.965 x 3.40 in

Pontiac 252ci specs: 3.965 x 3.40 in (100.7 x 86.4 mm) bore and stroke. Displacement, compression and factory ratings, plus rod ratio.

At a glance

Displacement	252 ci
Cylinders	6
Bore	3.965"
Stroke	3.400"
Compression	8.0:1
Years	1982

This engine

Engine	Displacement	Bore × Stroke	CR	HP
LC4	252 ci	3.965" × 3.4"	8:1	—

Factory cars with a Pontiac 252ci

• Pontiac Bonneville: 1982, LC4

What varies across the family

This family is represented by a single engine in the database: 252 ci, 6 cylinders, a 3.965" × 3.4" 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.

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