Audi adds a second crossover vehicle in 2009 with the Q5. Smaller than the Q7, the five-passenger premium Audi Q5 is powered by a 3.2-liter V-6 engine. A higher-performance version of the Audi TT, the 2009 TTS features unique details such as HID headlights, larger front air intakes and 18-inch wheels. The 2009 Audi TTS is most noted for its 265-horsepower, turbocharged 2.0-liter engine. All-new Audi A4 styling and engineering appear on the sedan as well as the Avant wagon for 2009. Based on a considerably longer wheelbase than its 2008 counterpart, the new A4 boasts greater passenger and cargo space. An all-new suspension and a more fuel-efficient 3.2-liter V-6 engine are part of the 2009 Audi A4. The Audi S4 skips the 2009 model year with a new version of the vehicle expected for the 2010 model year. For 2009, leather trim is now standard on a refreshed Audi A3. The five-door hatchback also provides the option of adding quattro all-wheel drive to models equipped with the turbocharged 2.0-liter engine. The Audi A6 and S6 features enhanced styling for 2009 while the A6 adds a new supercharged 3.0-liter engine.