Here is a good article on the EcoDiesel. It says, " So, it [the complete engine] actually weighs a little more than a Hemi engine".
http://www.dieselarmy.com/engine-tech/engine/an-inside-look-at-the-ram-1500-3-0l-ecodiesel/
http://www.dieselarmy.com/engine-tech/engine/an-inside-look-at-the-ram-1500-3-0l-ecodiesel/