Pontiac 195ci Specs: 4.063 x 3.75 in

Pontiac 195ci specs: 4.063 x 3.75 in (103.2 x 95.3 mm) bore and stroke, shared by all 2 versions. Displacement, compression and factory ratings.

At a glance

Displacement	195 ci
Cylinders	4
Bore	4.063"
Stroke	3.750"
Compression	8.6–10.3:1
Advertised power	110–166 hp
Years	1961–1963
Cylinder head data	2 of 2 engines

Engines in this family

Engine	Displacement	Bore × Stroke	CR	HP
Pontiac 195ci · 4.063" × 3.75" · 8.6:1	195 ci	4.063" × 3.75"	8.6:1	110–130
Pontiac 195ci · 4.063" × 3.75" · 10.25:1	195 ci	4.063" × 3.75"	10.25:1	120–166

Factory cars with a Pontiac 195ci

• Pontiac LeMans: 1961, 110 hp; 1961, 120 hp; 1961, 140 hp; 1961, 155 hp; 1962, 110 hp; 1962, 115 hp; 1962, 120 hp; 1962, 140 hp; 1962, 166 hp; 1963, 115 hp; 1963, 120 hp; 1963, 140 hp; 1963, 166 hp

What varies across the family

Compression spans 8.6:1 to 10.25:1, so fuel requirements differ meaningfully between members — worth checking before assuming parts interchange.

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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