Pontiac 112ci Specs: 3.50 x 2.91 in

Pontiac 112ci specs: 3.50 x 2.91 in (88.9 x 73.9 mm) bore and stroke. Displacement, compression and factory ratings for each, plus rod ratio and piston speed.

At a glance

Displacement	112 ci
Cylinders	4
Bore	3.500"
Stroke	2.910"
Compression	9.0:1
Years	1982

This engine

Engine	Displacement	Bore × Stroke	CR	HP
L46	112 ci	3.5" × 2.91"	9:1	—

Factory cars with a Pontiac 112ci

• Pontiac Sunbird: 1982, L46

What varies across the family

This family is represented by a single engine in the database: 112 ci, 4 cylinders, a 3.5" × 2.91" 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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