For more information, including pricing with options, see our full review of the 2013 Audi A5. The Audi A5 and its sporty S5 and RS5 derivatives are two-door luxury cars, first introduced in the U.S. for the 2008 model year. The A5 coupe and Cabriolet convertible are offered only with four-cylinder engines, while the supercharged six-cylinder S5...