Chevrolet 261ci Specs: 3.875 x 3.688 in

Chevrolet 261ci specs: 3.875 x 3.688 in (98.4 x 93.7 mm) bore and stroke. Displacement, compression and factory ratings, plus rod ratio.

At a glance

Displacement	261 ci
Cylinders	6
Bore	3.875"
Stroke	3.688"
Advertised power	150 hp
Years	1962

This engine

Engine	Displacement	Bore × Stroke	CR	HP
Chevrolet 261ci (1962)	261 ci	3.8752" × 3.6882"	—	150

Factory cars with a Chevrolet 261ci

• Chevrolet C/K Pickup: 1962, 150 hp

What varies across the family

This family is represented by a single engine in the database: 261 ci, 6 cylinders, a 3.8752" × 3.6882" 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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