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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).

Michelin Challenge Design 2007: The not so ugly truth about rising vehicle safety standards

Can cars be safe and beautiful at the same time? That may not have been the case a few decades ago when automakers were forced to hang those big, ugly so-called federal bumpers off the ends of their vehicles.  With vehicle safety standards on the rise around the globe are designers today feeling a little '70s deja vu when it comes to meeting the challenges of making cars safe as well as more fuel efficient? "(Back then) we said it was the end of automotive styling," says Patrick Le Quement, senior vice president for corporate design at Renault and one of the world's most influential automotive designers.

2014 Cadillac CTS sedan priced at $46,025

The base 2014 Cadillac CTS sedan will cost $46,025 when it goes on sale this fall. That’s a $6,035 increase from the current model’s $39,990 price after shipping charges. For 2014, the CTS sedan is seeing a major overhaul, with a longer, leaner body and a new optional twin-turbo 3.6-liter V6 engine rated at 420 hp.