The new Audi S5 Sportback is to debut in Frankfurt Motor Show 2009, with a 328-horsepower supercharged 3.0-liter V6, seven-speed dual-clutch gearbox and Quattro all-wheel drive.

The new Audi S5 Sportback, which is not expected to reach U.S. shores any time soon, features a supercharged 3.0-liter V6 rated at 328 horsepower and 325 pound-feet of torque. Audi claims 0-60 acceleration takes less than 5.4 seconds, with top speed limited to 155 mph.

The high-output engine is mated to a seven-speed S tronic dual-clutch gearbox, driving all four wheels through Audi’s Quattro system. Somewhat surprisingly, average fuel economy is 29 mpg.

The S5 Sportback features stiffer suspension and 18-inch alloy wheels shod with 245/40R18 tires.

Sales in Europe begin next spring, with prices starting at $83,000.

Audi’s focus on lower emissions and higher mileage has not rested solely on clean diesels. A new A3 variant to be unveiled in Frankfurt features a new 1.2-liter TFSI turbocharged direct-injection four-cylinder gas engine rated at 104 hp and 129 lb-ft.

With front-wheel drive and a six-speed manual transmission, the A3 1.2 TFSI ambles from 0-60 in around 11 seconds, but returns a remarkable 51 mpg on the combined European driving cycle, with CO2 emissions of only 127 g/km.