The 4.7-liter V-8 shares some of the HEMI engine’s combustion technology with its twin spark plugs per cylinder. It also makes use of increased compression ratio, improved cylinder head port flow and a new slant/squish combustion system designed to optimize fuel economy, power and torque.
This engine is also compatible with E85 fuel, earning the Flexible Fuel Vehicle (FFV) designation that provides customers the option of operating their vehicle on mixtures of gasoline and ethanol.
Unlike some others in the marketplace, Dodge will continue to offer customers a V-6 engine.
Standard on all-new 2009 Dodge Ram two-wheel-drive regular cab and Quad Cab® models is a 3.7-liter Magnum V-6 engine, generating 215 horsepower (160 kW) and 235 lb.-ft. (319 N•m) of torque.
Similar to the 4.7-liter and 5.7-liter V-8 engines, the 3.7-liter V-6 is equipped with Electronic Throttle Control, which provides engine torque control while compensating for changes in engine load caused by the air conditioning compressor, alternator and power steering pump.
The 3.7-liter V-6 also offers fuel economy and performance benefits from technologies including exhaust gas recirculation, compacted graphite-iron bedplate and internal balance shaft.
6.7-liter Cummins Turbodiesel: Cleanest on the Market
The Dodge Ram Heavy Duty’s 6.7-liter Cummins turbodiesel engine already meets 2010 truck emissions standards in all 50 states, making the 2009 Dodge Ram Heavy Duty the cleanest diesel truck available on the market today.
The inline six-cylinder turbodiesel engine uses a diesel particulate filter (DPF) to virtually eliminate particulate matter emissions and an adsorber catalyst to reduce oxides of nitrogen (NOx) by as much as 90 percent.
In addition to the NOx adsorber and the DPF, the 6.7-liter turbodiesel engine includes other technologies to improve fuel efficiency and reduce unburned hydrocarbons:
As durable as it is powerful, the 6.7-liter Cummins turbodiesel has life-to-major overhaul intervals of 350,000 miles, providing more than a 100,000-mile advantage over the competition.
All-new Light-duty Cummins Turbodiesel
Dodge will introduce an all-new Cummins turbodiesel engine in its light-duty pickup trucks after 2009.
The new engine will provide a dramatic increase in low-end torque, up to a 25-percent improvement in fuel efficiency and a 20-percent reduction in carbon dioxide (C02) emissions when compared to an equivalent gasoline engine.
With new, clean, quiet diesel technology, the new diesel engine will meet 50-state emissions standards for 2010.
All-new Dodge Ram 1500 Hybrid
The Dodge Ram 1500 Hybrid, available after 2009, will be the latest addition to Chrysler LLC’s fuel-efficient lineup, joining clean diesel, HEMI and flex-fuel vehicles.
Combining Chrysler’s Multi-displacement System (MDS) and two-mode hybrid technology to greatly improve fuel economy, the 5.7-liter HEMI Hybrid V-8 offers performance and efficiency with up to 40 percent fuel economy improvement in the city and 25 percent overall. The two-mode hybrid system is currently being introduced in the company’s 2009 Dodge Durango HEMI Hybrid and 2009 Chrysler Aspen HEMI Hybrid.
The two-mode hybrid system uses electric motors to allow the HEMI V-8 to remain in four-cylinder mode more often, improving fuel economy.
In the first mode – at low speeds and with light loads – the vehicle may operate on electric power only, on engine power only, or any combination of the two. The Dodge Ram 1500 Hybrid may operate in electric-only mode during slow starts (city driving) up to 25 mph, further conserving fuel and reducing emissions. In addition, the HEMI V-8 can shut down when the vehicle comes to a stop or during deceleration, to conserve fuel and then seamlessly restart when power is necessary.
The second mode, used primarily at highway speeds, augments electric assist with full power from the 5.7-liter HEMI when conditions demand it.
The Dodge Ram 1500 Hybrid also features regenerative braking, which recycles electric energy that would normally be lost during braking or deceleration. This energy is reused to power the vehicle.
The Dodge Ram 1500 Hybrid will also benefit from Dodge Ram’s best-in-class aerodynamics, which allows a greater operating range of MDS.
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