Audi S8

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The plush S8 swaps the naturally aspirated 5.2-liter V-10 of its predecessor for the most powerful version of Audi’s twin-turbocharged 4.0-liter V-8 engine. Peak power is up to 512 hp, with torque increased to 479 pounds-feet. The increased reserves are channeled to all four wheels through a specially adapted eight-speed Tiptronic automatic gearbox that supports automatic stop/start and brake-energy recuperation. The sedan has a claimed 0-to-62-mph time of just 4.2 seconds and a top speed, like that of all of Audi’s new S models, limited to 155 mph.