It is the world’s most exclusive car showroom. Customers fly in by private jet to a former Swedish airforce base where each Koenigsegg “supercar” is custom-made. They test drive the 245mph vehicle around the airfield before deciding whether to part with the €1m ($1.4m) needed to buy one. Just 18 were sold last year.

Koenigsegg Automotive is the brainchild of Christian von Koenigsegg, a Swedish entrepreneur who founded the company at the age of 22 with an ambition to produce “the ultimate car”. Fifteen years later, he is preparing for another challenge.