New technologies make Ram’s HEMI® efficient

Posted on Monday, June 30th, 2008 at 11:11 AM EDT.

The introduction of the all-new 2009 Dodge Ram powertrain lineup yesterday revealed that the basic features that make HEMI® synonymous with power are still there. However, several technologies were added or improved: variable valve timing (VVT); expanded operating range of the fuel-saving Multi-Displacement System (MDS); increased compression ratio; active intake manifold with long runners for low-end torque and short runners for high-rpm power; improved cylinder head port flow efficiency; and reduced-restriction exhaust and induction systems. The result is improved idle quality and overall refinement, more horsepower (13 percent), more torque (8 percent) and better fuel economy (4 percent). “The all-new 5.7-liter HEMI V-8 engine will offer our customers better fuel economy, improved idle quality and overall refinement, along with more horsepower and torque,” Bob Lee, Vice President—PowerTrain Product Team, said. “HEMI has always been synonymous with power, and now—thanks to VVT, expanded four-cylinder mode in our MDS system, and a host of other technologies—Chrysler’s new HEMI delivers more fuel efficiency and refinement, along with even more power.”

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