What is the difference in gas mileage between the HEMI and the 4.7. I am going to buy a 08 4X4 and trying to decide between the two. I do not pull anything, I only want it for the beefy look and sound

 

this has been discussed before with much input here:

https://dodgeforum.com/m_741825/tm.htm

in a nutshell the MDS version of the 5.7 is as least as good as the old 4.7V8 and maybe a bit better at highway cruise below 65 mph

Both 5.7 and 4.7 are revised for year 2009
so things may have changed slightly