Designer Ian Callum on the new XJ: "The new car clearly had to be instantly recognizable, capturing the essence and style of XJ but in a more modern idiom." Because it's a much bigger and taller car than its predecessor, the trunkline had to be raised for good aerodynamics, yet the rear still retains the trademark "boat-tail shape, achieved via the slope of the trunklid. Callum also pointed to the roofline as an integral part of retaining classic Jaguar sleekness, even suggesting that the chrome line is the most important design element of the car. Despite the XJ's size, elegance was maintained with slimmer glass-to-door proportions. Avoiding the "laid back" stance of previous XJs, Callum penned a high degree of wedge in the profile and created a cab-forward, aggressive stance by positioning the wheels closer to the corners, using a shorter hood and a less acute rake angle for the larger windshield.