Dodge
Those 20-inch wheels accomplish a couple of things. For starters, the Dodge Charger AWD and Dodge Challenger AWD both sit higher than their RWD counterparts, leaving extra space between the tires and the surrounding bodywork. The bigger 20-inch wheels help to shrink that dead space a bit, which is more aesthetically pleasing.
Beyond that, the new 20-inch wheels are deeper than the regular 19-inch wheels Dodge's AWD models have heretofore been restricted to, measuring 8 inches across instead of 7.5. That allows them to make use of tires of a greater section width, which not only look less awkward than the skinny tires previously fitted to all AWD Dodge muscle cars, but also deliver superior grip and traction most of the time, save for conditions like deep snow.