Mazda 245ci Specs: 100.4 x 84.4 mm

Mazda 245ci specs: 100.4 x 84.4 mm (3.9528 x 3.3228 in) bore and stroke, shared by all 2 versions. Displacement, compression and factory ratings.

At a glance

Displacement	245 ci
Cylinders	6
Bore	3.953"
Stroke	3.323"
Compression	9.0–9.7:1
Advertised power	160–207 hp
Years	1994–2009

Engines in this family

Engine	Displacement	Bore × Stroke	CR	HP
Ford Cologne 4.0 OHV V6	245 ci	3.9528" × 3.3228"	9:1	160
Ford Cologne 4.0 SOHC V6	245 ci	3.9528" × 3.3228"	9.7:1	207

Factory cars with a Mazda 245ci

• Mazda B-Series: 1994, 160 hp; 1995, 160 hp; 1996, 160 hp; 1997, 160 hp; 1998, 160 hp; 1999, 160 hp; 2000, 160 hp; 2001, 207 hp; 2002, 207 hp; 2003, 207 hp; 2004, 207 hp; 2005, 207 hp; 2006, 207 hp; 2007, 207 hp; 2008, 207 hp; 2009, 207 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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