The 5.7-liter V-8, which puts out 325 horsepower with 390 lb.-ft of torque, debuts for model year 2005 in the all-new Grand Cheokee. As described by DC, "The engine's unique two-valve Hemispherical combustion chamber (which gives the engine its "Hemi" name) within an aluminum head provides impressive air flow, torque and power, and gives the engine its throaty rumble. The engine started production at the Salitillo plant in Mexico in June of 2002. More than 35,000 engines per month have been rolling off the assembly lines. The engines will be used in pickups, Dakotas, Durangos, Grand Cherokees and other large Chrysler vehicles like the 300 series.

The Hemi engine in the Grand Cherokee includes Cylinder Deactivation, a feature which shuts down four of the eight cylinders during idling and light-demand situations, such as highway driving, by electronically controlling the flow of oil to valve lifters. Engines with this enhanced fuel-saving multi-displacement feature started production in January of 2004.

Facts and features:

The 5.7-liter Hemi® Magnum V-8 engine is an internally balanced pushrod (OHV) 90-degree V-8. The cast iron block is a deep skirt and cross-bolted design with cylinder bore spacing the same as the engine it replaces.

The aluminum cylinder features a two-valve per-cylinder, Hemispherical combustion chamber with dual spark plugs and a coil over plug ignition for best-in-class airflow and power. An Integrated Air Fuel Module (IAFM) incorporates the function of 26 individual components in the induction and fuel system, thereby reducing cost, weight and engine plant complexity.

A systematic approach to sealing, using premium elastomeric materials and state-of-the-art practices, helps ensure a leak-free, weep-free engine. The power plant's simple and efficient design means servicing and repairs are easier and less costly.

Grand Cherokee 5.7L Hemi Specifications

• Description: Eight cylinders, 90-degree V-type, liquid cooled. Deep-skirt cast iron block with cross-bolted main bearing caps, aluminum alloy heads with Hemispherical combustion chambers

• Bore x stroke: 3.92 x 3.58 (99.5 x 90.9)

• Camshaft: Silent chain, 5-bearings. Bi-metal material except number 3 Babbit. Deep-fillet rolled journals for improved fatigue life, press fit damper to minimize torsional vibration

• Compression Ratio: 9.6:1

• Connecting rods: Forged with cracked cap, powder metal, bi-metal bearings

• Crankshaft: Nodular cast iron, tuned assembly vibration damper, 6 bi-metal bearings

• Displacement: 354 CID (5,654 cu. cm)

• Engine speed, max: 5,800 rpm

• Fuel injection: Sequential, multi-port, electronic, returnless

• Fuel requirement: Unleaded mid-grade, 89 octane (R+M)/2 - recommended, Unleaded regular, 87 octane (R+M)/2 - acceptable. Premium is not recommended.

• Knock sensors: Dual, wide band

• Manifold, intake: Seven-piece composite construction with electronic throttle control

• Oil capacity: 7 qt. (6.6L)

• Pistons: Aluminum strutless, 3-ring

• Piston pins: Floating in piston, press-fit in rod

• Power (2500 series): (SAE net) 330 bhp @ 5100 rpm

• Torque: (SAE Net) 375 lb.-ft @ 3500 rpm

• Valve system: Pushrod-operated overhead valves, 16 valves, hydraulic lifters with roller followers

• Valves, intake: SAE 547 steel, solid stem, PMF-22 seats

• Valves, exhaust: 23-8N steel, solid stem, PMF-22 seats