Arias Pistons 12.5:1 Compression 82mm Bore Honda B-series on 2040-parts.com

Lamborghini Aventador LP700-4 Roadster (2013) first pictures

Lamborghini has chopped the top off the Aventador supercar to create the new 2013 LP700-4 Roadster. The big news? The loss of the Murcielago convertible's hopeless 'umbrella' soft-top, which took a couple of people 10 minutes to erect - but only after much head-scratching and swearing.

New Audi RS6 to get 572bhp V8

The 2013 Audi RS6 looks set to swap its V10 for the new Audi V8 with the wick turned up to 572bhp – the same as the old V10. Most of the new A6 range has now arrived in showrooms – including the S6 and Avant – but what’s still missing is a new RS6, the Audi that used to have the heart of a Lamborghini. But as we reported in April, the 2013 RS6 is well on the way but it will be losing its Lamborghini V10 with its 5.2 litres and 572bhp and will instead get the Audi/Bentley twin-turbo 4.0 litre V8.

E85 makes inroads on cost and availability

Three years ago, we embarked on a Midwest road trip in search of what was then the Holy Grail of fuel: E85. Our findings weren't too positive--there were far more E85-compatible vehicles on the road in 2006 (5 million) than there were E85 pumps to fuel them (about 700 out of some 200,000 fuel stations nationwide). In addition, those burning the mix of 15 percent gasoline and 85 percent ethanol were paying a pretty penny for their earth-friendly ways, losing about 15 percent in fuel economy while often paying the same price as for regular unleaded.