Among the handful of car designers with creative genius, as opposed to a mere talent for engineering, Ferdinand Pors­che’s reputation is secure. Bugatti’s artistic flair, Royce’s “infinite capacity for taking pains”, even Colin Chapman’s prolific inven­tiveness with Lotus are overshadowed by a man who not only gave his name to one of the world’s most coveted cars, but also made him a sort of automotive Leonardo da Vinc