The Jaguar XK is a luxurious, sporty two-door coupe. Now in its second generation, the XK originally replaced the XJS coupe in 1997. All-aluminum and seriously sporty, the XK competes with the BMW 6-Series, Chevrolet Corvette, Mercedes-Benz S Class, and Porsche 911, particularly in supercharged XKR trim. The first-generation Jaguar XK was...