The A4 is available as a 4-door sedan or as a 5-door station wagon dubbed the Avant. Power comes from a 2.0L 4-cylinder engine, which delivers 211 turbocharged horsepower. A 6-speed Tiptronic automatic transmission or a 6-speed manual transmission are available on Quattro models, while front-drive models receive a continuously variable transmission (CVT) as standard equipment.
The slick S4 comes as a sedan or an Avant wagon, each powered by a new 3.0L supercharged V6 putting out 333 hp, delivered to all four wheels via either a 6-speed manual or the 7-speed S-tronic transmission. The S-tronic transmission features twin clutches and provides blistering quick shifts controlled by paddles on either side of the steering wheel. The new motor replaces the 4.2L V8 offered last year, and although power is down slightly from that engine's 340 horses, the new powerplant produces less CO2 emissions. A new Quattro Sport Rear Differential is available as well, which routes torque laterally between the rear wheels to help eliminate understeer.
The A4 come in three trim levels: Premium, Premium Plus and Prestige. Premium cars come nicely equipped with standards like 17-inch alloy wheels, cruise control, leather seating, heated power mirrors, power driver's seat, a sunroof, Sirius satellite radio, Bluetooth connectivity and Homelink, Servotronic speed-sensitive steering and a split-folding rear seat back.
Premium Plus trim adds amenities such as 3-zone air conditioning, heated front seats, fog lights and dynamic self-adjusting Bi-Xenon headlights.
Finally, the Prestige trim brings 18-inch alloy wheels, keyless start, aluminum interior inlays, voice actuated navigation, Audi acoustic parking system, a Bang & Olufsen premium stereo system and a special lighting package.
The aggressive S4 comes outfitted with special 18-inch wheels, Bluetooth, 4-way electrically adjustable lumbar support in both front sport seats and of course that powerful V6.
Popular standalone options on the new A4 include a Navigation Package with rearview camera, walnut or ash wood inlays, heated front seats, adaptive cruise control, and Audi drive select, which allows drivers to choose a set-up for the chassis and suspension, from comfort to sport, which alters the driving and handling characteristics of the A4.