Buick has completely revamped its lineup and the Regal is no exception. The sedan has been equipped with a hatch for a more dynamic look. Its 2.0L four-cylinder engine develops 250 horsepower, while the Regal GS relies on a 310-horsepower, 3.6L V6. A nine-speed automatic gearbox and front-wheel drive come factory standard. All-wheel drive, matched to an eight-speed automatic transmission, is available on option.