Given this, it says a lot that the new 2009 Audi S4 sedan has busted through our wall of skepticism. There’s no twin-turbo V10, but it’s got a real engine. And this time the S-line designation really means something.
The 3.0-liter V6 TFSI engine in the new Audi A6 range is the first supercharged Audi engine in several decades. In standard form, the Roots-type Eaton supercharger provides max boost pressure of 11.6 psi, delivering 285 horsepower and 310 pound-feet of torque for the A6. For the 2009 Audi S4, this same engine with the same boost results in 329 hp and 324 lb-ft of torque. With the standard six-speed Getrag manual transmission in place, this power gets the S4 sedan to 100 km/h (62 mph) from a stop in just 5.1 seconds, while the optional S tronic seven-speed dual-clutch transmission gets you there in 5.3 seconds. Which is plenty quick either way.
Source: Inside Line