The adage 'win on Sunday, sell on Monday' is traditionally used to explain how important motor racing is to road car manufacturers.
However, the game has changed considerably over the years. In those formative years – indeed, all the way up until the 1970s – the saloon and sports cars on the world's most famous race tracks and rally stages were often derived directly from road machines.
Improvements in safety and increases in performance mean that today's motorsport vehicles often bear very little resemblance to the models customers can buy from their local dealership.
For example, your local Audi dealer isn't likely to offer you a tempting discount on Ingolstadt's RS5 DTM car anytime soon. So is modern motor racing less valid for the manufacturers? Quite the opposite, but the game has changed dramatically.