Mercury Duratec 30 Specs: 3.504 x 3.13 in, 221 hp

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Mercury Duratec 30 specs: 181 ci (3.0L) 6-cylinder, 3.504 x 3.13 in (89 x 79.5 mm) bore and stroke, 10:1 compression. Rated 221 hp, 2006–2009.

The Mercury 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).

10:1 is in the range that usually runs on pump premium.

It is one of 2 engines in the Mercury 181ci family, all of them 181 ci — the differences between them are in compression, heads and rating, not displacement. 4 factory variants share these dimensions, rated at 221 hp across 2006–2009.

Dimensions

Displacement	181 ci / 3 L
Bore	3.5039"
Stroke	3.1299"
Cylinders	6
Configuration	V6
Compression ratio	10:1
Bore/stroke ratio	1.119

Construction

Fuel type	gas
Advertised HP	221 hp
Years	2006–2009

Factory ratings by year

Year	Version	HP @ rpm	Torque @ rpm	Comp.
2006	net	221 @ 6250 *	205 lb-ft @ 4800 *	—
2008	net	221 @ 6250	205 lb-ft @ 4800	10:1

Factory specification sheet. * Not yet cross-verified.

What these numbers mean

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
Static compression	10:1 — in the range that usually runs on pump premium

Run the numbers for this engine

Each link opens the calculator with this engine's specs already filled in.

• Displacement from bore and stroke (calculator)
• Static and dynamic compression ratio calculator
• Piston ring gap for this bore
• Piston speed at any RPM
• Horsepower to torque at any RPM
• What size carburetor (CFM calculator)

Variants sharing these dimensions (4)

These records share identical bore, stroke, displacement and compression. They differ by model year and factory power rating.

Year	Advertised HP	Code
2006	221 hp	Duratec 30
2007	221 hp	Duratec 30
2008	221 hp	Duratec 30
2009	221 hp	Duratec 30

What cars have the Duratec 30?

6 factory vehicles, 1996–2012. Each year opens that model's engine table.

• Ford Taurus: 1996, 200 hp; 1997, 200 hp; 1998, 200 hp; 1999, 200 hp; 2000, 200 hp; 2001, 200 hp; 2002, 200 hp; 2003, 200 hp; 2004, 200 hp; 2005, 200 hp
• Mercury Sable: 1996, 200 hp; 1997, 200 hp; 1998, 200 hp; 1999, 200 hp; 2000, 200 hp; 2001, 200 hp; 2002, 200 hp; 2003, 200 hp; 2004, 200 hp; 2005, 200 hp
• Ford Escape: 2001, 200 hp; 2002, 200 hp; 2003, 200 hp; 2004, 200 hp; 2005, 200 hp; 2006, 200 hp; 2007, 200 hp; 2008, 200 hp; 2009, 240 hp; 2010, 240 hp; 2011, 240 hp; 2012, 240 hp
• Mercury Milan: 2006, 221 hp; 2007, 221 hp; 2008, 221 hp; 2009, 221 hp
• Ford Fusion: 2006, 221 hp; 2007, 221 hp; 2008, 221 hp; 2009, 221 hp
• Lincoln MKZ: 2006, 221 hp

Similar engines

• Mercury Duratec 30 FFV — 181 ci
• Mercury Duratec · 3.504" × 3.130" · 10:1 — 182 ci
• Mercury Duratec 30 — 182 ci
• Mercury 3 0 Vulcan V6 — 182 ci
• Mercury Vulcan — 182 ci
• Mercury Vulcan 3.0 OHV V6 — 182 ci
• Audi CAPA — 181 ci
• Buick LN7 — 181 ci

← All Mercury 181ci engines