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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.

2013 Audi A3 sketches revealed

2013 Audi A3 Hatch - there's also a saloon in the gallery below We’ve already had something of a glimpse of part of the next generation Audi A3 with the reveal at Geneva last month of the Audi A3 Concept. That Audi A3 Concept – which came complete with 400bhp and a boot – was really a look at the next generation RS3 in saloon guise – an Audi A3 that will go down a storm in an America quickly realising the joys of something smaller and swift. But now, for whatever reason, Audi has decided to release sketches of the 2013 Audi A3 in both saloon and hatchback form, together with a single sketch of the interior.

Photos reveal the all-new Ford Mustang -- of 1979

If you need further proof that everything old is new again, just look at the engine options for the upcoming 2015 Ford Mustang. That optional 2.3-liter turbocharged inline-four is generating a lot of buzz; it's expected to help keep the car sporty while cutting down on fuel consumption, and it's going to help the Mustang make headway in overseas markets. Adding a turbo-four to the pony car equation isn't exactly novel: The Blue Oval put a forced-induction motor with the same cylinder count, configuration and displacement in the 1979 Mustang.