While it's still early to determine whether Ram's 3.0-liter EcoDiesel V-6 will have the same level of sustained success as Ford's EcoBoost GDI V-6, if initial demand is any indication, the class-exclusive new powertrain is off to a running start. Ram Trucks has released information claiming that the initial allocation of 8000 EcoDiesel Ram 1500 models were spoken for by dealers between February 7 and 10. The diesels accounted for a full 50 percent of all special orders from dealers. Approximately 400 trucks have already been paid for by customers without even having driven the truck.

The Ram 1500 EcoDiesel is the current fuel economy champ of full-size trucks, with an official rating of 20 city and 28 highway on the 2WD model, and 19 city and 27 highway on the 4WD model. However, Ram may have some competition in the wings with the announcement of a new 2.7-liter EcoBoost V-6 engine for the 2015 Ford F-150, which will also include auto stop-start.

The Ford is expected to have a substantial weight advantage over the Ram, but has only a six-speed transmission for the time being, although a 10-speed transmission is expected to come in 2016. Although unconfirmed, Ford is reportedly working on a light-duty diesel for the new F-150, possibly debuting in 2017 or 2018.

Source: Chrysler, Automotive News