The 2009 Audi A4 Avant will feature the 2.0 TFSI, a new high-powered four-cylinder turbocharged engine that has 211 hp and 258 lb-ft of torque. The current A4 Avant offers 200 hp and 207 lb-ft of torque. The 2009 A4 Sedan will also offer drivers the 2.0 TFSI or the option of a 3.2 FSI V6, with 265 hp and the patented Audi Valvelift Technology (AVS). Enhancements to the V6 include considerably lower inner friction and a valve actuation system called the Audi Valvelift System which varies the stroke of the intake valves. The engines will improve performance, while reducing fuel consumption versus previous generations. A number of transmission options are also available, including a six-speed manual and tiptronic transmission, which is optional for the 3.2 FSI.

The Avant's proportions have been reconfigured significantly from the previous generation model to emphasize both sport and practicality. The front overhang has been shortened, while the hood and wheelbase have increased in size. The new A4 Avant measures 15.42 feet in length, making it 4.72 inches longer than its previous model. Its body is considerably more rigid and safer in build than its predecessor, while still being approximately 10 percent lighter. Those proportions yield the largest luggage capacity in its class, with up to 50.5 cubic feet of cargo space.

Other points of emphasis in the interior and exterior design are the xenon plus headlights, which consist of 14 white light-emitting diodes, and a driver-oriented cockpit that borrows many features from the larger A8, including an electro-mechanical parking brake that also comes standard on other Audi models.

Technology options for the new model include a complete range of high-tech systems. These include the Audi parking system (a parking aid and standard for the A4 Avant), Audi lane assist (the lane departure warning system) and Audi side assist (which warns of hazards when changing lanes). The adaptive cruise control option maintains the distance to the vehicle in front.

When it comes to multimedia, the Audi A4 Avant will meet every user's needs. The Audi Music Interface (AMI) allows for iPod connectivity and control. The navigation system with DVD including MMI is an additional upgrade option. Bluetooth connectivity for cell phones is included, as well. The car audio system is by Bang & Olufsen. A 505 watt, ten-channel amplifier controls 14 speakers.