Its lithe design may evince all the calm of the cool exec in the corner office, but underneath lurks muscle that could only be forged in the boxing gym. For its line-topping sedan, the XJ Supersport, that brute power comes in the form of a 5-liter, 510-hp supercharged V8 which, come workday’s end, propels it to sixty mph in a scant 4.7 seconds. With more leather, wood, and fine English speakers than a cigar bar, that figure seems an anomaly — until you find out that an aluminum frame partially offsets the added weight of those posh amenities. On our test drive, a laggy infotainment system caused a few minor headaches, but its all-day torque offered enough respite to make every ride ten times more fun than any corporate retreat.
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