Mazda Rx-7 1986-88 Normally Aspirated Bypass Air Control Valve Bac on 2040-parts.com

Ferrari 458 Challenge (2010) more official pictures

This is the new Ferrari 458 Challenge, the latest in a line of racers to emerge from Maranello. It was unveiled at today's Bologna motor show. It's not the first time we've seen the race-spec 458, but they've issued more photos of it.

Audi S3 Saloon goes on sale in the UK – price from £33,240

The Audi S3 Saloon (pictured) is now on sale in the UK If you want a relatively compact pocket rocket, Audi has you covered with the S3. So far, we’ve had the regular S3 and S3 Sportback (and the S3 Cabriolet is on the way), but if you prefer your S3 in a standard four-door saloon guise, you’re in luck – the Audi S3 Saloon has arrived in the UK. With the same 296bhp 2.0 litre TFSI engine as its S3 siblings, the S3 saloon offers strong performance – 0-62mph in 4.9 seconds – and an official combined economy of 40.9mpg (which means emissions of 159g/km (if you opt for the S Tronic gearbox).

Mystery Porsche prototype destroyed in fire near Stuttgart

According to the Porsche-lovers at flatsixes.com, an unknown Porsche prototype caught fire after being taken home by an employee earlier this week. It reportedly took 19 firefighters to extinguish the blaze, which occurred in a home garage in Ludwigsburg, Germany (a city located near Porsche's home in Stuttgart). Fortunately, the employee and his wife suffered only minor injuries, but we assume the prototype is a complete loss.