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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).

Euro NCAP finds quadricycles had “severe safety problems”

Euro NCAP has branched out from cars and crash tested a small selection of “heavy quadricycles”  – small, four-wheeled vehicles that were originally developed from motorcycles that are sometimes also known as microcars, and don’t come under the usual car regulations. Although legal for use on the road, these machines do not need to achieve the same rigorous crash test safety standards as ordinary cars. But they are increasingly seen as a fuel-efficient urban transportation alternative, and some of them can be driven teenagers as young as 16.

Low-emissions Chevrolet Volt models shipped to California

Californians won't have to wait much longer to take their Chevrolet Volts in high-occupancy vehicle lanes. General Motors began shipping a special version of the range-extended sedan to the state this week. The cars will arrive with a special Low Emissions package that makes it legal to drive them in the Golden State's carpool lanes.