Range Rover Sport SVR vs Porsche Cayenne Turbo track battle

The new Range Rover Sport SVR puts out a storming 542bhp - but how does it compare to the Porsche Cayenne Turbo on the track? See the Range Rover Sport SVR take on the Porsche Cayenne Turbo and Audi RS6 here - http://www.autoexpress.co.uk/land-rov...