Porsche 164ci Specs: 85.5 x 78 mm

Porsche 164ci specs: 85.5 x 78 mm (3.3661 x 3.0709 in) bore and stroke, shared by all 4 versions. Displacement, compression and factory ratings.

At a glance

Displacement	164 ci
Cylinders	6
Bore	3.366"
Stroke	3.071"
Compression	11.0–11.3:1
Advertised power	217–245 hp
Years	2000–2008

Engines in this family

Engine	Displacement	Bore × Stroke	CR	HP
M96.22	164 ci	3.3661" × 3.0709"	11:1	217
M96.23	164 ci	3.3661" × 3.0709"	11:1	225
M96.25	164 ci	3.3661" × 3.0709"	11:1	240
M97.20	164 ci	3.3661" × 3.0709"	11.3:1	245

Factory cars with a Porsche 164ci

• Porsche Boxster / Cayman: 2000, 217 hp; 2001, 217 hp; 2002, 217 hp; 2003, 225 hp; 2004, 225 hp; 2005, 240 hp; 2006, 240 hp; 2007, 245 hp; 2008, 245 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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