Chevrolet 191ci Specs: 3.50 x 3.31 in

Chevrolet 191ci specs: 3.50 x 3.31 in (88.9 x 84.1 mm) bore and stroke, shared by all 5 versions. Displacement, compression and factory ratings.

At a glance

Displacement	191 ci
Cylinders	6
Bore	3.500"
Stroke	3.310"
Compression	9.0–9.6:1
Advertised power	135–160 hp
Years	1990–1999
Cylinder head data	2 of 5 engines

Engines in this family

Engine	Displacement	Bore × Stroke	CR	HP
Chevrolet 191ci · 3.500" × 3.310" · 9:1	191 ci	3.5" × 3.31"	9:1	135–140
Chevrolet 191ci (1990) · 142 hp	191 ci	3.5" × 3.31"	9.4:1	142
Chevrolet 191ci · 3.500" × 3.310" · 9.6:1	191 ci	3.5" × 3.31"	9.6:1	155–160
LH0	191 ci	3.5" × 3.31"	—	140
L82	191 ci	3.5" × 3.31"	—	150–160

Factory cars with a Chevrolet 191ci

• Buick Regal: 1990, LH0, 135 hp; 1991, LH0, 140 hp; 1992, LH0, 140 hp; 1993, LH0, 140 hp; 1994, L82, 160 hp; 1995, L82, 160 hp; 1996, L82, 160 hp
• Chevrolet Camaro: 1990, LH0, 140 hp; 1991, LH0, 140 hp; 1992, LH0, 140 hp
• Oldsmobile Cutlass: 1990, LH0, 135 hp; 1991, LH0, 140 hp; 1992, LH0, 140 hp; 1993, LH0, 140 hp; 1994, L82, 160 hp; 1995, L82, 160 hp; 1996, L82, 160 hp; 1997, L82, 155 hp; 1997, L82, 160 hp; 1998, L82, 150 hp; 1999, L82, 150 hp
• Buick Skylark: 1995, L82, 155 hp; 1996, L82, 155 hp; 1997, L82, 155 hp; 1998, L82, 155 hp
• Chevrolet Monte Carlo: 1995, L82, 160 hp; 1996, L82, 160 hp; 1997, L82, 160 hp; 1998, L82, 160 hp; 1999, L82, 160 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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