Audi’s A4 entry-sedan is also available as the company’s S4 entry-level performance vehicle. Like the A4 lineup, the Audi S4 comes in a wide array of configurations that include the S4 sedan, S4 cabriolet and the S4 Avant (the company’s term for station wagon). For the 2010 model year, the A4 and S4 cabriolet will switch to the A5 and S5 moniker and design. The S4 replaces the A4’s inline-4 and V-6 engine options with a 340-horsepower, 4.2-liter V-8 that mates to a six-speed manual transmission and feeds power to all four wheels with Audi’s quattro® all-wheel drive system. A sport-tuned suspension not only gives the S4 improved handling, but the lower ride height also adds a more aggressive stance.

Like other S models, styling changes are discreet but improved aerodynamics and style to the souped-up S4 cars. Other than slight tweaks to the front and rear fascia to improve aerodynamics and airflow, the S4 models get quad outlet dual exhaust for increased performance. Stylish, seven-spoke wheels also add a stylish look, while providing a wider footprint for the wider performance tires. Inside, a unique gauge cluster and carbon fiber trim accent the S4’s sportiness, while the sedan and Avant models get improved bolstering from the Recaro bucket seats for the front passengers.