Chevrolet 265ci Specs: 3.75 x 3.00 in

Chevrolet 265ci specs: 3.75 x 3.00 in (95.3 x 76.2 mm) bore and stroke, shared by all 2 versions. Displacement, compression and factory ratings.

At a glance

Displacement	265 ci
Cylinders	8
Bore	3.750"
Stroke	3.000"
Compression	10.7:1
Advertised power	145–200 hp
Years	1955–1996
Cylinder head data	1 of 2 engines

Engines in this family

Engine	Displacement	Bore × Stroke	CR	HP
Chevrolet 265ci · 3.750" × 3.000" · 10.7:1	265 ci	3.75" × 3"	10.7:1	200
Trademaster 265	265 ci	3.75" × 3"	—	145–155

Factory cars with a Chevrolet 265ci

• Chevrolet 3100 Pickup: 1955, 145 hp; 1956, 155 hp; 1957, 155 hp
• Chevrolet Bel Air: 1955, 162 hp; 1955, 180 hp; 1956, 162 hp; 1956, 170 hp; 1956, 205 hp; 1957, 162 hp
• Chevrolet Corvette: 1956, 210 hp; 1956, 225 hp; 1956, 240 hp
• Chevrolet Caprice: 1994, L99, 200 hp; 1995, L99, 200 hp; 1996, L99, 200 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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