Aston Martin boss Ulrich Bez used to be the head of R&D at Porsche. The Porsche 993, still regarded as the best of the air-cooled 911s, was developed on his watch, so you could say he knows a thing or two about sports cars. Never one to doubt the veracity of his view of the world, Bez left Porsche after clashes with senior management, most notably over the stillborn four-door 989, and spent several years in the wilderness at Daewoo.