With a roaring V8 and a price tag to match, Jeep's so-called "Final Edition" is part off-road monster, part highway toy—but it isn’t for everyone.

Dodge has long been synonymous with loud and throaty V-8s, but as a new age dawns over muscle cars, power has taken a new form that makes the brand's legendary Hemi V-8 a bit of a moot point. Just ...