Jaguar XK

The new Jaguar XK is elegant to behold, but it seems to lack the swagger and rakish charm of progenitors like the XK 120, XK SS, XKE and XJ 220.

The Jaguar XK's teardrop-shape headlamps and taillights are one departure. "I looked at the old E-Type elliptical headlights and said, 'It's been done,' " the designer said. "Too obvious. Let's do something different."

The coupe's liftback, however, is pure E-Type. The convertible's rear haunches look a bit swollen, but that is because the trunk had to be big enough to hold the retracted softtop and some luggage.

The Jag does not have a retracting hardtop, like rivals from Cadillac, Lexus and Mercedes-Benz. "There's more power and presence in having two cars — a convertible and a coupe," Mr. Callum said. "It's not just a choice; it's to challenge which one to buy."