More expensive and sportier than the Q7, the Audi Q8 is limited to five seats instead of seven. The base engine is a turbocharged V6 delivering 335 horsepower. If you opt for the SQ8, you’ll get a turbocharged V8 that boosts output up to 500 horsepower. Finally, the cream of the crop is the RS Q8, which uses the same V8 but somehow generates 591 horsepower. Pricing can go as high as nearly $130,000.