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Audi Quattro concept (2013) at Frankfurt motor show

This is our first look at Audi’s new Quattro concept, the latest evolution of Ingolstadt’s plot to build a flagship super-coupe inspired by its Eighties all-wheel drive icon. However, it doesn’t just look a whole lot more aggressive than the original 2010 Quattro concept – it’s also massively punchier under the skin. What’s new exterior-wise for the 2013 Audi Quattro concept?

The Grand National Roadster Show is like church, with chrome trim

You can argue all day about which is the best and most influential hot-rod show in the world, but we'll take the Grand National Roadster Show, which will be held this weekend at the Fairplex in Pomona, Calif. This is the 61st running of what grizzled veterans have simply called "Oakland," after the city that hosted it for its first half-century. This is the seventh year the show has been held in the Art Deco halls and sprawling avenues of the Fairplex, all of which will be under sunny skies and balmy temps all weekend.

Chevrolet Volt fire probe is closed, NHTSA says

U.S. safety regulators said Friday that they've closed an eight-week investigation into the Chevrolet Volt, concluding that the plug-in hybrid's battery doesn't pose a significant fire risk following a crash. In a statement, the National Highway Traffic Safety Administration said it "does not believe that Chevy Volts or other electric vehicles pose a greater risk of fire than gasoline-powered vehicles." The agency said that modifications intended to reinforce the Volt's 435-pound lithium-ion battery pack that General Motors announced on Jan.