The XJ experience wouldn’t be complete without a pulsating engine under the bonnet. Jaguar supplies four powertrains for you to pick from, so you can select maximum thrills or optimum fuel economy. If supercar-like acceleration in limousine surroundings is the goal, go for the XJR and its 543bhp 5.0-litre supercharged petrol unit. 0-62mph is completed in an exhilarating 4.2 seconds. The autobiography’s 503bhp equivalent gets you there 0.3 seconds after. The 335bhp petrol is the most frugal of the fuel type, but is beaten in this area by the 3.0-litre turbocharged V6 diesel. It returns up to 49.6mpg combined yet charges from zero to 60mph in 5.9 seconds. Front and rear parking aids come as standard to guide you into tight spaces without incident. More technology works on the open road to prevent accidents and help you to feel in complete control. JaguarDrive Control with three modes deserves highlighting. Selecting from Dynamic, Normal and Winter modes adjusts the throttle and steering mapping to suit the driving conditions ahead. A Whiplash Protection System for the front seats minimises the chance of injury should you collide with an obstacle. Meanwhile, Pedestrian Contact Sensing helps to protect those outside of the cabin.