2010 Ram 1500
Engine: Cummins 5.6L V-8 (est.)
Power: 300 hp (est.)
Torque: 460 lb-ft (est.)
Dodge
The all-new Dodge Ram 1500 will grab headlines for its new aerodynamic look, the new multi-link coil rear suspension, and maybe even the innovative cargo bins built into the bedsides. But we think the most interesting announcement is that a Cummins diesel engine will be offered "after 2009." Dodge says the diesel will be 50-state legal and get 30 percent better fuel economy than a 1/2-ton Ram with a gas engine. It's likely the engine will be a result of the Light Truck Diesel program conducted with the Department of Energy that led to the birth of two new engines. The Cummins 5.6L V-8 that was developed makes 300 hp and 460 lb-ft of torque, and the 4.2L V-6 creates 270 hp and 420 lb-ft of torque. Both engines were predicted to get 25 mpg on the highway when fitted in a 1/2-ton truck, so it's anybody's guess to which one will be under the hood of the 2010 Ram 1500 Cummins.
Ford
The F-150 is all-new for '09 with a new interior and sheetmetal, a frame that's 10 percent stiffer, and Ford says a diesel is planned for 2010. Two possible engines are a 4.4L V-8 or a 2.7L V-6, both with dual variable-geometry twin turbos. Variants of these PSA-designed Lion family of engines are used in Land Rovers and other Ford Motor Company vehicles overseas. The V-8 is predicted to get up to 350 hp and 500 lb-ft of torque, and the V-6 puts out more than 200 hp and 320 lb-ft of torque while getting an incredible 49 mpg in the Jaguar S-Type.
Engine: Cummins 4.2L V-6 (est.)
Power: 270 hp (est.)
Torque: 420 lb-ft (est.) | 
2010 Ford F-150
Engine: PSA Lion 4.4L V-8 twin-turbo (est.)
Power: 350 hp (est.)
Torque: 500 lb-ft (est.)Engine: PSA Lion 2.7L V-6 twin-turbo (est.)
Power: 207 hp (est.)
Torque: 320 lb-ft (est.) | 
2009 Acura / 2010 Honda
Engine: 2.2L inline 4-cylinder i-DTEC
Power: 140 hp (est.)
Torque: 251 lb-ft (est.) |
Honda / Acura
"We will debut i-DTEC technology in the U.S. next year that will meet the same Tier2, Bin5 emissions standard as a gasoline engine vehicle. [But, without the need for a tank of urea onboard.] This i-DTEC clean diesel engine will be introduced first on an Acura brand vehicle in 2009. ... This will be followed in the future by the introduction to a Honda model."
-Takeo Fukui, president and CEO Honda Motor Co., Ltd