Kia 165ci Specs: 86.7 x 75 mm

Kia 165ci specs: 86.7 x 75 mm (3.4134 x 2.9528 in) bore and stroke, shared by all 2 versions. Displacement, compression and factory ratings, plus rod ratio.

At a glance

Displacement	164.8 ci
Cylinders	6
Bore	3.413"
Stroke	2.953"
Compression	10.0–10.4:1
Advertised power	170–194 hp
Years	2006–2010

Engines in this family

Engine	Displacement	Bore × Stroke	CR	HP
G6BA	164.8 ci	3.4134" × 2.9528"	10:1	170
G6EA	164.8 ci	3.4134" × 2.9528"	10.4:1	185–194

Factory cars with a Kia 165ci

• Kia Optima / K5: 2006, G6BA, 170 hp; 2006, G6EA, 185 hp; 2007, G6EA, 185 hp; 2008, G6EA, 185 hp; 2009, G6EA, 194 hp; 2010, G6EA, 194 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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