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Top 5 most important cars at the 2013 Frankfurt motor show

The five most important memorable cars in attendance at the world’s biggest motor show Nothing is as controversial as irritating your core enthusiasts, and the Audi Sport Quattro concept risks doing just that. Its name and styling riff off one of the most iconic cars in Audi’s back catalogue – and in WRC history – yet the new yellow version unveiled at the 2013 Frankfurt motor show has abandoned the five-cylinder engine, manual gearbox, and respectable kerbweight of the 2010 Quattro concept. In its place, we’ve an RS7-based coupe with the power of a Lamborghini Aventador (691bhp), twice the claimed economy of a Golf GTD (113mpg), but only because of a twin-turbo V8 mated to a hefty hybrid powertrain, and that means this new Sport Quattro weighs as much as a Bugatti Veyron Super Sport (1845kg).

Driven: BMW X3

The BMW X3 had the premium CUV market to itself when launched in 2004. Skip forward to the launch of the second generation and not only does the new version have a whole host of competitors for company, it also has to fit around its X1, X5 and X6 siblings. We took the 2011 BMW X3 (known internally as F25) to the Austrian Tyrol and spoke to its exterior designer, Erik Goplen, to find out if it still has the segment covered.

Chevrolet plays the name game with paint color for the upcoming Volt

We know the Chevrolet Volt is going to be green, but what color will it be? Chevy is staging a contest to officially name the color of the Volt, and it's down to three finalists: EV-ergreen, environMINT and Viridian Joule. Two of the names were submitted by California residents, and one came from Florida.