Ram PowerTech 4.7 Specs: 3.661 x 3.413 in, 230-310 hp

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Ram PowerTech 4.7 specs: 287 ci (4.7L) 8-cylinder, 3.661 x 3.413 in (93 x 86.7 mm) bore and stroke. Rated 230-310 hp, 2000–2011. Used in the Dodge Dakota.

The Ram PowerTech 4.7 is oversquare — the 3.6614" bore exceeds the 3.4134" stroke by 7.3% — a layout that favors airflow and RPM over leverage at the crank. The 3.4134" stroke does not reach 4,000 ft/min of mean piston speed until about 7,050 RPM, so piston speed is not what limits this engine's revs — valvetrain and breathing are. Each of the 8 cylinders displaces 35.9 ci (588 cc).

It is one of 8 engines in the PowerTech family, the largest at 287 ci. 19 factory variants share these dimensions, rated from 230 to 310 hp across 2000–2011.

Dimensions

Displacement	287 ci / 4.7 L
Bore	3.6614"
Stroke	3.4134"
Cylinders	8
Configuration	V8
Bore/stroke ratio	1.073

Construction

Block material	cast iron
Head material	aluminum
Valvetrain	SOHC
Fuel type	gas
Advertised HP	230–310 hp
Years	2000–2011

What these numbers mean

Bore/stroke character	1.073 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves
Mean piston speed at 6,000 RPM	3,413 ft/min — conservative for a street engine
Displacement per cylinder	35.9 ci

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 (19)

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

Year	Advertised HP	Code
2000	235 hp	PowerTech 4.7
2001	235 hp	PowerTech 4.7
2002	235 hp	PowerTech 4.7
2003	235 hp	PowerTech 4.7
2004	230 hp	PowerTech 4.7
2004	235 hp	PowerTech 4.7
2005	230 hp	PowerTech 4.7
2005	235 hp	PowerTech 4.7
2006	230 hp	PowerTech 4.7
2006	235 hp	PowerTech 4.7
2007	230 hp	PowerTech 4.7
2007	235 hp	PowerTech 4.7
2008	302 hp	PowerTech 4.7
2008	303 hp	PowerTech 4.7
2008	310 hp	PowerTech 4.7
2009	302 hp	PowerTech 4.7
2009	303 hp	PowerTech 4.7
2010	302 hp	PowerTech 4.7
2011	302 hp	PowerTech 4.7

Factory cars with this engine

• Dodge Dakota: 2000, 235 hp; 2001, 235 hp; 2002, 235 hp; 2003, 235 hp; 2004, 235 hp; 2005, 230 hp; 2006, 230 hp; 2007, 230 hp; 2008, 302 hp; 2009, 302 hp; 2010, 302 hp; 2011, 302 hp
• Dodge Durango: 2000, 235 hp; 2001, 235 hp; 2002, 235 hp; 2003, 235 hp; 2004, 230 hp; 2005, 230 hp; 2006, 230 hp; 2007, 230 hp; 2008, 303 hp; 2009, 303 hp
• Ram 1500: 2002, 235 hp; 2003, 235 hp; 2004, 235 hp; 2005, 235 hp; 2006, 235 hp; 2007, 235 hp; 2008, 310 hp

Similar engines

• Ram 47 Powertech V8 — 287 ci
• Ram EVA (FlexFuel) — 287 ci
• Ram PowerTech 4.7 H.O. — 287 ci
• Ram PowerTech (2009–2013) — 287 ci
• Ram Magnum · 3.909" × 3.311" · 9.1:1 — 318 ci
• Ram LA 318 — 318 ci
• GMC 287 — 287 ci
• Jeep EVA — 287 ci

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