Being underpowered is subjective, the 3.7L V6 makes as much power as small block V8's of only a few years ago, the Drive-by-Wire computer controlled throttle is probably more responsible for people complaining, "it ain't got the get up and go I want"....but there are a few points that make the V8 a better deal.
The V6's almost always came with QTI 4X4, which doesn't have a 4LOW nor the ability to switch the XFR Case into neutral. A few did come with QTII, but what are the chances you're going to find one of those in the used market.
The 4.7L V8 mostly came with QTII, which can shift into 4LOW, locking the XFR case and shift the XFR case into neutral, something you need for towing behind an RV or serious off-roading.
Some of the HEMI V8's came with the QDII that can do everything that the QTII can do, plus has electronic LSD's in both front and rear axle, that provide even more serious off-roading ability.
The simpler 4X4 systems are still plenty capable off road, and less complex and have less trouble. The QTI doesn't have the N23, Service 4WD system that you see a lot posts about.
But if you want to do be able to do true mudding, you need the 4LOW of the QTII or QDII systems, and QDII with the ELSD's is even better. You'll have to change axle fluid more often and will have more things to break. The V8 power when mudding is more than a small advantage.
Like mentioned, the gas mileage difference is negligible, the V8's are so efficient now, its really doesn't make much of a difference. The V6's were popular because of the price, the difference in cost for V6 vs a HEMI made a significant difference in the selling price, and might make for a difference used car prices as well.
Oh BTW, the MDS of the Hemi shuts down 4 of the 8 cylinders, NOT just 2.
Oh yea, room to work on the engine, sorry, the modern crash protection standards puts so much extra metal, bigger frame rails and extra frame pieces in the front of the car, even the V6 is crowded as all get out and a total PITA to fit your hands into places to work on it, the V8's are even worse.
Last edited by Mongo; 08-01-2016 at 03:16 PM.