2008 Jeep Commander5.7L V8 MPI
 

I am a little confused. My documents show V8 Hemi 4WD, however, Carfax report shows:5.7L V8 MPI

Does this mean it's a Hemi?

Yes its the 5.7 liter Hemi read your badges ;-)

"4WD" is four-wheel-drive. "MPI" is multi-port injection.

Yes lol. Go here: http://www.jeep.com/webselfservice/j...527R%2527%2529
Click on 'equipment listing' off to the left, then enter your VIN. It will auto generate a build sheet.

Open the hood and look.
Make sure you didn't carfax the wrong VIN.
Make sure the VIN at the windshield matches the one in the door opening.