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Mercedes-Benz, Duesenberg named winners at Concours d'Elegance of America

A 1933 Duesenberg Model SJ Riviera Phaeton Brunn and a 1938 Mercedes-Benz 540K Autobahn Kurrier took top honors at the Concours d'Elegance of America at St. John's in suburban Detroit on Sunday. The event was formerly known as the Meadow Brook Concours d'Elegance, but it was moved this year from the grounds of Oakland University north of Detroit to Plymouth, a suburb west of the city.

Novitec Alfa Romeo 8C Spider adds boost for a sensuous 600 hp

Novitec has laid hands on the near-perfect Alfa Romeo 8C to create the 8C Spider Kompressor, a car the tuner claims is the “most powerful street-legal Alfa Romeo of all time.” Heady words, but they're nicely backed up by a supercharged version of the 4.7-liter Alfa V8 cranking out 600 hp and 434 lb-ft of torque. That's up from approximately 450 hp and 346 lb-ft on a stock Alfa Romeo 8C Competizione. Tweaks supporting the force-fed mill include a water-to-air intercooler, custom injectors and revised fuel and ignition mapping, plus a variable stainless-steel exhaust system.

Autoweek in review: What you might have missed

At the start of the week, Kia announced that it will launch a rear-wheel-drive sedan code-named the KH in the first half of 2012. U.S.-based press officials wouldn't comment on whether the KH would come stateside, despite a 36 percent increase in U.S. Kia sales in 2011.