Pontiac 110ci Specs: 3.339 x 3.13 in

Pontiac 110ci specs: 3.339 x 3.13 in (84.8 x 79.5 mm) bore and stroke, shared by all 2 versions. Displacement, compression and factory ratings.

At a glance

Displacement	110 ci
Cylinders	4
Bore	3.339"
Stroke	3.130"
Compression	8.0:1
Advertised power	84–150 hp
Years	1983–1986

Engines in this family

Engine	Displacement	Bore × Stroke	CR	HP
LH8	110 ci	3.3386" × 3.1299"	—	84
LA5	110 ci	3.3386" × 3.1299"	8:1	150

Factory cars with a Pontiac 110ci

• Pontiac Sunbird: 1983, LH8, 84 hp; 1984, LH8, 84 hp; 1984, LA5, 150 hp; 1985, LH8, 84 hp; 1985, LA5, 150 hp; 1986, LH8, 84 hp; 1986, LA5, 150 hp

What varies across the family

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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