Download Print Special Report: HEMI® Engine The 5.7-liter HEMI® Auburn Hills, Mich. June 9, 2004 - View video animations of the Multi-Displacement System. (Requires Real Player) "5.7L HEMI Multi-Displacement System (MDS) animation" (Overhead view, approx. 30 seconds) "Dodge Magnum HEMI 5.7L V-8 animation" (Close-up view, approx. 30 seconds) High bandwidth High bandwidth Medium bandwidth Medium bandwidth Low bandwidth Low bandwidth The Chrysler Group 5.7-liter HEMI® is Elegantly Simple, Delivering Power and Fuel Economy No other engine in U.S. history has the heritage and recognition of the Chrysler Group HEMI®. While completely re-engineered from the legendary 426 HEMI V-8 that powered Chrysler muscle cars of the 1960s, the two features that earn the new 5.7-liter HEMI power plant its HEMI name are: The hemispherically shaped combustion chamber designed to accommodate large valves and put the spark plugs close to the center of the combustion chamber The cross-flow valve arrangement that is perpendicular to the crank-shaft centerline Facts and Features In the Chrysler 300C, Dodge Magnum RT and the all-new 2005 Jeep® Grand Cherokee, the 5.7-liter HEMI is equipped with Chrysler Group's Multi-Displacement System (MDS), which turns off four of the cylinders when V-8 power is not needed, giving customers up to a 20 percent improvement in fuel economy. The 5.7-liter HEMI engine is an internally balanced pushrod, OHV 90-degree V-8. The cast iron block is a deep-skirt design with cross-bolted main bearing caps. The aluminum cylinder heads feature two valves per cylinder, hemispherical combustion chambers with dual spark plugs and coil-over-plug ignition. 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. The 5.7-liter HEMI marks Chrysler Group's first application of an electronic throttle control in a rear-wheel-drive vehicle. 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. Specifications Type and description: Eight cylinders, 90-degree V-type, liquid cooled Displacement: 345 cu. in. (5.7-liter) Bore x stroke: 3.92 in. x 3.58 in. (99.5 mm x 90.9 mm) Valve system: Pushrod-operated overhead valves, 16 valves (eight deactivating, eight conventional when equipped with Multi-Displacement System), hydraulic roller lifters Fuel injection: Sequential, multi-port, electronic, returnless Construction: Deep-skirt cast iron block with cross-bolted main bearing caps. Aluminum alloy heads with hemispherical combustion chambers Compression ratio: 9.6:1 Power (SAE net): 345 hp (257 kW) @ 5400 rpm, (61.0 hp/L), truck applications; 340 hp (254 kW) @ 5000, passenger vehicle applications Torque (SAE net): 375 lb.-ft. (508 Nm) @ 4200 rpm, truck applications; 390 lb.-ft. (525 Nm) @ 4000, passenger vehicle applications Max. engine speed: 5800 rpm (electronically limited) Fuel requirement: Unleaded mid-grade, 89 octane (R+M)/2 - recommended; Unleaded regular, 87 octane (R+M)/2 - acceptable Oil capacity: 7 qt. (6.6L)