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Change at the top
Audi's new A6 is the third new model in the brand's large-sedan family. The redesigned A8 flagship went on sale in the States last fall, the new A7 fastback sedan reaches U.S. dealers in May, and the redesigned A6 completes the changeover when it arrives in September as a 2012 model.

About five months after Audi confirmed that the TT RS Coupe would be coming to America, the hottest version of the sporty 2+2 finally made its debut at the 2011 Chicago Auto Show. Somewhat curiously, however, it did so without any fanfare, with Audi quietly placing it near an R8 Spyder at its stand with nary a mention of the car's special nature other than the glass barrier that surrounds it.

No matter how many times I drive an Audi A4 2.0T, I still wind up double-checking to confirm that I am, in fact, sitting behind a four-cylinder engine and not some excellent six-cylinder. Indeed, the words and numbers on the spec sheet -- 211 horsepower, four-wheel-drive, 31-mpg on the highway, and 3600 pounds -- simply do not jive with how spirited and fun the A4 is to drive. Mash the throttle, and the 2.0-liter responds instantly, emitting a throaty howl and propelling this heavy, leather-lined sedan more briskly than it has any business doing. It's not merely a smoke screen of low-end torque and short gearing, either. Snap the precise stick shift into second, and it keeps on pulling.