Three years and 4.4million kilometres in themaking
Behold the shiny new Cayenne. But what, exactly, does it take to bring such an incredibly complex new car to market? 4.4 million kilometres of testing miles conducted in temperatures from minus 45 degrees centigrade right up to fully 50 degrees of baking heat, for starters.
To simulate the most extreme stresses possible, prototypes are tested all over the world, from race tracks like the Nürburgring to the sand dunes of Dubai, the dusty slopes of Death Valley in the USA, the frozen wastelands of Alaska and the stop-start torture of traffic in China's biggest cities. Porsche says individual prototypes are tested so exhaustively, they can rack up a quarter of a million kilometres in just a few months.
Porsche reckons these testing conditions, which also include hydraulic rigs that give the entire car a brutal battering, are far tougher than the vehicles are likely to experience when owned by customers. Useful to know as you cruise the leafy lanes of the home counties or pootle through west London...