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

Lamborghini LP650-4 Roadster – in the wild

Lamborghini Murcielago LP650-4 Roadster at a motor event in the US We first got details on the new Lamborghini LP650-4 Roadster back in February, and Lamborghini subsequently issued a set of pictures to show it was real. But it was a bit of a surprise to see a real one turn up at a Lamborghini event in the US. Sporting the same 650bhp as the Lamborghini Reventon, the LP650-4 Roadster is the last of the line of open-topped Murcielagos (apart from the Reventon Roadster – which as there will only be 9 doesn’t really count), and is the successor to the LP640 Roadster.

Listen: Upcoming Ford Focus ST to employ sound symposer

While BMW employs a digitally sanitized/perfected sound file to give M5 owners the proper sense of aggro urgency when motoring at pace, Porsche went a little more organic with its employment of a sound symposer to feed the 911's flat-six growl into the cabin of the extra-refined 991. Essentially, the sound symposer is an electrically controlled diaphragm in a tuned sound tube that brings the proper engine noises into the passenger compartment. It can be opened and closed by the car's onboard electronics to offer snarl when you want it and serenity when you don't.

Hot Hatch Special

By the CAR road test team 27 February 2009 09:00 An astonishing 24,524 CAR Online readers voted in our poll to find the greatest hot hatch of all time – and the results are now in. Below we count down the top 46 pocket rockets, hot hatches and GTIs, as voted for by you. Read our verdicts – and yours – below, download the wallpapers of the most affordable sporting models on the planet.