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

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.

Peugeot Onyx concept [w/Gallery]

Peugeot has previewed its Onyx concept, set to debut at this month's Paris motor show, just days after the first teaser images were released. Very much a supercar in terms of its proportions and form, the Onyx is not the first time Peugeot's previewed super and super-sports cars in concept form, but the Onyx looks a lot more promising than previous efforts, from these photos at least. Conforming to the modern, eco-conscious supercar norm, the Onyx features a hybrid drivetrain - following in the footsteps of the BMW i8, Honda NSX and Jaguar CX-75.  Peugeot's stated aim is to push itself upmarket and become a more premium brand, so the Onyx could be read as a sign that the company feels it needs more of a 'halo' car in order to achieve that aim.

Renault Twingo

Renault has released the first official picture of the new Twingo, a model set to make its debut at the forthcoming Frankfurt motor show. A clear departure from current form, the revised Twingo adopts the DRG from the DeZir, R-Space and Captur concepts. The full width grille sits atop foglights reminiscent more of the Nissan Juke than the DeZir's smaller items.