Dodge 181ci Specs: 3.587 x 2.992 in

Dodge 181ci specs: 3.587 x 2.992 in (91.1 x 76 mm) bore and stroke, shared by all 6 versions. Displacement, compression and factory ratings, plus rod ratio.

At a glance

Displacement	181 ci
Cylinders	6
Bore	3.587"
Stroke	2.992"
Compression	8.0–10.0:1
Advertised power	136–320 hp
Years	1987–2000

Engines in this family

Engine	Displacement	Bore × Stroke	CR	HP
6G72	181 ci	3.5866" × 2.9921"	8.9:1	136–150
6G72 SOHC	181 ci	3.5866" × 2.9921"	8.9:1	164
6G72 DOHC	181 ci	3.5866" × 2.9921"	10:1	222
6G72 DOHC twin turbo	181 ci	3.5866" × 2.9921"	8:1	300–320
Mitsubishi 6G72 SOHC V6 MPI	181 ci	3.5866" × 2.9921"	8.9:1	141
6G72 SOHC V6 MPI	181 ci	3.5866" × 2.9921"	8.9:1	—

Factory cars with a Dodge 181ci

• Dodge Caravan: 1987, 136 hp; 1990, 142 hp; 1991, 142 hp; 1992, 142 hp; 1993, 142 hp; 1994, 142 hp; 1995, 142 hp; 1996, 150 hp; 1997, 150 hp; 1998, 150 hp; 1999, 150 hp; 2000, 150 hp
• Dodge Daytona: 1990, 141 hp; 1991, 141 hp; 1992, 141 hp; 1993, 141 hp
• Dodge Ram 50: 1990; 1991; 1992
• Dodge Stealth: 1991, 164 hp; 1992, 164 hp; 1993, 164 hp; 1995, 164 hp

What varies across the family

Compression spans 8:1 to 10:1, 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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