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Ford Duratec 30 specs: 181 ci (3.0L) 6-cylinder, 3.504 x 3.13 in (89 x 79.5 mm) bore and stroke. Rated 200-240 hp, 1996–2012. Used in the Ford Taurus.
The Ford Duratec 30 is oversquare — the 3.5039" bore exceeds the 3.1299" stroke by 11.9% — a layout that favors airflow and RPM over leverage at the crank. The 3.1299" stroke does not reach 4,000 ft/min of mean piston speed until about 7,650 RPM, so piston speed is not what limits this engine's revs — valvetrain and breathing are. Each of the 6 cylinders displaces 30.2 ci (494 cc).
It is one of 2 engines in the Ford 181ci family, all of them 181 ci — the differences between them are in compression, heads and rating, not displacement. 21 factory variants share these dimensions, rated from 200 to 240 hp across 1996–2012.
| Displacement | 181 ci / 3 L |
|---|---|
| Bore | 3.5039" |
| Stroke | 3.1299" |
| Cylinders | 6 |
| Configuration | V6 |
| Compression ratio | 10–10.3:1 (published figures vary) |
| Bore/stroke ratio | 1.119 |
| Fuel type | gas |
|---|---|
| Advertised HP | 200–240 hp |
| Years | 1996–2012 |
| Year | Version | HP @ rpm | Torque @ rpm | Comp. |
|---|---|---|---|---|
| 1996 | net | 200 @ 5750 * | 200 lb-ft @ 4500 * | — |
| 1997 | net | 200 @ 5750 * | 200 lb-ft @ 4500 * | — |
| 1998 | net | 200 @ 5750 | 200 lb-ft @ 4500 | — |
| 1999 | net | 200 * | — | — |
| 2000 | net | 200 * | — | — |
| 2002 | net | 200 @ 5650 | 200 lb-ft @ 4400 | — |
| 2003 | net | 200 @ 5650 | 200 lb-ft @ 4400 | — |
| 2004 | net | 200 @ 5500 | 207 lb-ft @ 4500 | — |
| 2005 | net | 200 @ 6000 | 193 lb-ft @ 4850 | — |
| 2006 | net | 200 @ 6000 | 193 lb-ft @ 4850 | — |
| 2006 | net | 221 @ 6250 | 205 lb-ft @ 4800 | — |
| 2007 | net | 200 @ 6000 | 193 lb-ft @ 4850 | — |
| 2007 | net | 221 @ 6250 | 205 lb-ft @ 4800 | — |
| 2008 | net | 200 @ 6000 | 193 lb-ft @ 4850 | — |
| 2008 | net | 221 @ 6250 | 205 lb-ft @ 4800 | — |
| 2009 | net | 221 @ 6250 | 205 lb-ft @ 4800 | — |
| 2009 | net | 240 @ 6550 | 223 lb-ft @ 4300 | — |
| 2010 | net | 240 @ 6550 | 223 lb-ft @ 4300 | — |
| 2011 | net | 240 @ 6550 | 223 lb-ft @ 4300 | — |
| 2012 | net | 240 @ 6550 | 223 lb-ft @ 4300 | — |
Factory specification sheet. * Not yet cross-verified.
| Bore/stroke character | 1.119 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 3,130 ft/min — conservative for a street engine |
| Displacement per cylinder | 30.2 ci |
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 |
|---|---|---|
| 1996 | 200 hp | Duratec 30 |
| 1997 | 200 hp | Duratec 30 |
| 1998 | 200 hp | Duratec 30 |
| 1999 | 200 hp | Duratec 30 |
| 2000 | 200 hp | Duratec 30 |
| 2001 | 200 hp | Duratec 30 |
| 2002 | 200 hp | Duratec 30 |
| 2003 | 200 hp | Duratec 30 |
| 2004 | 200 hp | Duratec 30 |
| 2005 | 200 hp | Duratec 30 |
| 2006 | 200 hp | Duratec 30 |
| 2006 | 221 hp | Duratec 30 |
| 2007 | 200 hp | Duratec 30 |
| 2007 | 221 hp | Duratec 30 |
| 2008 | 200 hp | Duratec 30 |
| 2008 | 221 hp | Duratec 30 |
| 2009 | 221 hp | Duratec 30 |
| 2009 | 240 hp | Duratec 30 |
| 2010 | 240 hp | Duratec 30 |
| 2011 | 240 hp | Duratec 30 |
| 2012 | 240 hp | Duratec 30 |
6 factory vehicles, 1996–2012. Each year opens that model's engine table.