Porsche is inviting enthusiasts to test their knowledge of the Porsche 911 to see if they can identify them by their distinctive engine sounds. To celebrate the launch of the new Evolution 911 course at the Porsche Experience Centre, Silverstone, you can log on to www.porsche.co.uk/competition and try your ears at identifying a variety of Porsche 911 models.

The 911 has an iconic sound partly due to its rear-mounted flat six engine. As the 911 has steadily evolved, so its engine sound – larger engines, turbocharging and, most significantly, a move to water-cooling from air-cooling.

Each contestant gains entry to a prize draw for the chance to win an Evolution 911 driving experience at Silverstone.