I can't speak for the Dodge Ram 1500, but the 3 liter diesel in my Grand Cherokee will pull the paint off the sides with low end torque and the eight speed trans and will pull a fully loaded U-Haul at 55 mph at 28 mpg. Unloaded at 65 mph, it gets a consistent 33 mpg, and that is at a scaled weight of 5600#, so my GC is not light.
I think my trailer towing capacity is up over 7,000#, too. Apple and oranges, possibly because of the weights on the Ram, but if you can test drive a GC with the "little diesel" and stick your foot in it, you're going to get a big smile! 8)
Just sayin'....