DETROIT - Audi has announced revised specs and pricing for its . The automaker says the car will be wider, longer and lower - and will get 15 percent better fuel economy.

Audi has lowered the drag coefficient, lightened the chassis and added a manual shift indicator light to help increase the gas mileage of its bread-and-butter vehicle.

Audi spokesman Christian Bokich told Inside Line that the 2.0-liter TFSI front-wheel-drive sedan with the multitronic transmission now gets 23 miles per gallon in the city and 30 mpg on the highway, while the bigger and more powerful 3.2-liter FSI six-cylinder manages to get 17 mpg in the city and 26 mpg on the highway. Audi promises more efficiency-driven technology in the near future, including a next-generation navigation system that will indicate the most fuel-efficient route.

Power isn't compromised, either: The 2.0-liter TFSI develops 211 horsepower and 258 pound-feet of torque, while the 3.2-liter V6 lays down 265 hp and 243 lb-ft of torque. That means 0-60-mph times of 6.3 seconds for the V6 and 6.5 for the four-cylinder A4.

Audi continues to be focused on its current lineup and future releases, so SEMA is out of the question this year, said Bokich: 'SEMA is a huge force, but now we need to let people know what our core product is about.'

The 2009 A4 will be on dealer lots in September. Pricing will start at $32,700 for the sedan, while the A4 Avant will carry an MSRP of $34,500.