Oldsmobile 151ci Specs: 4.002 x 3.01 in

Oldsmobile 151ci specs: 4.002 x 3.01 in (101.7 x 76.5 mm) bore and stroke, shared by all 3 versions. Displacement, compression and factory ratings.

At a glance

Displacement	151 ci
Cylinders	4
Bore	4.002"
Stroke	3.010"
Compression	8.5–9.1:1
Advertised power	90–110 hp
Years	1982–1992
Cylinder head data	2 of 3 engines

Engines in this family

Engine	Displacement	Bore × Stroke	CR	HP
Oldsmobile 151ci · 4.002" × 3.010" · 8.5:1	151 ci	4.002" × 3.01"	8.5:1	90–110
Oldsmobile 151ci (1986) · 92 hp	151 ci	4.002" × 3.01"	9.14:1	92
L68	151 ci	4.002" × 3.01"	—	92–110

Factory cars with a Oldsmobile 151ci

• Oldsmobile Cutlass: 1985, L68, 92 hp; 1986, LR8, 92 hp; 1986, L68, 92 hp; 1987, L68, 98 hp; 1988, L68, 98 hp; 1989, L68, 110 hp; 1990, L68, 110 hp; 1991, LR8, 110 hp; 1991, L68, 110 hp; 1992, LR8, 110 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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