OK, I'll bite. The Hemi you heard of is a gas motor which is offed in the 03 2500 and up ram truck.
I doubt there is such a thing as a Hemi Diesel.
The Inline 6 is a much better configuration than a V-8 . 30% or more, less moving parts. Until the 03 model you could look at a Phord or Maxipad and see the differance. You could not see the engines for all the wires and tubes. The Dodge was wide open until they made the engine room smaller.
Dave