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Mazda Ford Cologne 4.0 SOHC V6 specs: 4.0L (245 ci) 6-cylinder, 100.4 x 84.4 mm (3.9528 x 3.3228 in) bore and stroke, 9.7:1 compression. Rated 207 hp.
The Mazda Ford Cologne 4.0 SOHC V6 is oversquare — the 3.9528" bore exceeds the 3.3228" stroke by 19.0% — a layout that favors airflow and RPM over leverage at the crank. The 3.3228" stroke does not reach 4,000 ft/min of mean piston speed until about 7,200 RPM, so piston speed is not what limits this engine's revs — valvetrain and breathing are. Each of the 6 cylinders displaces 40.8 ci (669 cc).
9.7:1 on aluminum heads is in the range that usually runs on pump premium; aluminum sheds heat faster than iron, which makes the same number a little more forgiving.
It is one of 2 engines in the Mazda 245ci family, all of them 245 ci — the differences between them are in compression, heads and rating, not displacement. 9 factory variants share these dimensions, rated at 207 hp across 2001–2009.
| Displacement | 245 ci / 4 L |
|---|---|
| Bore | 3.9528" |
| Stroke | 3.3228" |
| Cylinders | 6 |
| Configuration | V6 |
| Compression ratio | 9.7:1 |
| Bore/stroke ratio | 1.19 |
| Block material | cast iron |
|---|---|
| Head material | aluminum |
| Valvetrain | SOHC |
| Fuel type | gas |
| Advertised HP | 207 hp |
| Years | 2001–2009 |
| Year | Version | HP @ rpm | Torque @ rpm | Comp. |
|---|---|---|---|---|
| 2002 | Ford Cologne 4.0 SOHC V6 net | 207 @ 5250 * | — | — |
| 2009 | Ford Cologne 4.0 SOHC V6 net | 207 @ 5250 * | 238 lb-ft @ 3000 * | — |
Factory specification sheet. * Not yet cross-verified.
| Bore/stroke character | 1.190 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 3,323 ft/min — conservative for a street engine |
| Displacement per cylinder | 40.8 ci |
| Static compression | 9.7:1 — in the range that usually runs on pump premium |
Each link opens the calculator with this engine's specs already filled in.
These records share identical bore, stroke, displacement and compression. They differ by model year and factory power rating.
| Year | Advertised HP | Code |
|---|---|---|
| 2001 | 207 hp | Ford Cologne 4.0 SOHC V6 |
| 2002 | 207 hp | Ford Cologne 4.0 SOHC V6 |
| 2003 | 207 hp | Ford Cologne 4.0 SOHC V6 |
| 2004 | 207 hp | Ford Cologne 4.0 SOHC V6 |
| 2005 | 207 hp | Ford Cologne 4.0 SOHC V6 |
| 2006 | 207 hp | Ford Cologne 4.0 SOHC V6 |
| 2007 | 207 hp | Ford Cologne 4.0 SOHC V6 |
| 2008 | 207 hp | Ford Cologne 4.0 SOHC V6 |
| 2009 | 207 hp | Ford Cologne 4.0 SOHC V6 |
1 factory vehicle, 2001–2009. Each year opens that model's engine table.