For more on the most recent models, including pricing with options, see our full review of the 2013 Audi A4 and S4--and our review of the 2013 Audi Allroad. The Audi A4 and its sporty S4 cousin are four-door luxury sedans, with another close relative in the Allroad all-wheel-drive wagon. In the current sport-sedan landscape, the Audi A4 is a...