Chevrolet 231ci Specs: 3.80 x 3.40 in

Chevrolet 231ci specs: 3.80 x 3.40 in (96.5 x 86.4 mm) bore and stroke, shared by all 3 versions. Displacement, compression and factory ratings.

At a glance

Displacement	231 ci
Cylinders	6
Bore	3.800"
Stroke	3.400"
Compression	8.5–11.8:1
Advertised power	185–200 hp
Years	1995–2005
Cylinder head data	1 of 3 engines

Engines in this family

Engine	Displacement	Bore × Stroke	CR	HP
Chevrolet 231ci · 3.800" × 3.400" · 11.8:1	231 ci	3.8" × 3.4"	11.8:1	200
Chevrolet 231ci · 3.800" × 3.400" · 9.4:1	231 ci	3.8" × 3.4"	9.4:1	200
Chevrolet 231ci · 3.800" × 3.400" · 8.5:1	231 ci	3.8" × 3.4"	8.5:1	185

Factory cars with a Chevrolet 231ci

• Chevrolet Camaro: 1995, L36, 200 hp; 1996, L36, 200 hp; 1997, L36, 200 hp; 1998, L36, 200 hp; 1999, L36, 200 hp; 2000, L36, 200 hp; 2001, L36, 200 hp; 2002, L36, 200 hp
• Chevrolet Monte Carlo: 1998, L36, 200 hp; 1999, L36, 200 hp; 2000, L36, 200 hp; 2001, L36, 200 hp; 2002, L36, 200 hp; 2003, L36, 200 hp; 2004, L36, 200 hp; 2005, L36, 200 hp
• Chevrolet Impala: 2000, L36, 200 hp; 2001, L36, 200 hp; 2002, L36, 200 hp; 2003, L36, 200 hp; 2004, L36, 200 hp; 2005, L36, 200 hp

What varies across the family

Compression spans 8.5:1 to 11.8:1, 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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