The folks at Pickuptrucks.com completed a comparison test featuring six pickups with six cylinder engines. The RAM 1500 Ecodiesel 4x4 was included. Also present were Tacoma, Frontier, Silverado, GMC and Honda Ridgeline.
The fuel economy test covered city, highway and gravel roads. The results had the Ecodiesel at 26 mpg. The other trucks, all powered by gas V6 engines, clustered around 20 mpg. That's a 30% better result for the Ecodiesel.
The Ecodiesel didn't fare as well in the value category. The truck tested was a Longhorn 4x4 that was loaded with options. Sticker was about $56K.
Another question raised by the test was the carrying capacity (not towing capacity) of the truck. With a curb weight of 6,460 lb, it seems the cargo capacity of the truck, equipped with Ecodiesel plus 4x4 plus air suspension plus options would be only 500 lb. Ouch! I think RAM will have to offer an upgrade to the coil springs when buying a diesel.
The comparison does not address the question, What about the Ford F150 with EcoBoost 3.5L V6 turbo, a vehicle with similar torque rating to the Ecodiesel? The EPA rates the Ecoboost at 15 city, 21 highway mpg. A similarly equipped Lariat SuperCrew Ecoboost 4x4 would cost about $44,000, and weigh about 5700 lb. GVWR is about 7300 lb, so payload is about 1600 lb. The $12,000 savings compared to the RAM would buy a lot of gasoline.
Read more here
http://special-reports.pickuptrucks.com/2014-annual-physical.html