Porsche 911 evolution competition challenges enthusiasts

Porsche is inviting enthusiasts to test their knowledge of the marque and identify specific Porsche 911 sports cars purely by their distinctive engine sounds.To celebrate the launch of the new Evolution 911 course at the Porsche Experience Centre, Silverstone, enthusiasts can log on to www.porsche.co.uk/competition and try their hand - or should that be their ear? - at identifying a variety of