Jaguar has retained the classic proportions and styling elements of previous XJ sedans while adding contemporary curves and four round headlights that lend a distinctive touch to the front end. Chassis and overall dimensions remain the same, but most of the mechanical particulars have been thoroughly revised: a completely redesigned aluminum in-line 6-cylinder engine, which includes a new supercharged variant; power and efficiency improvements to the super-smooth V12; a stronger chassis; and more powerful brakes. An in-line 6-cylinder engine design is inherently smoother than a V6, and the latest Jaguar six is a honey. It produces more power and more torque than the previous generation - enough to give the basic sedan, heavy as it is, acceleration that we'd call lively. However, if really brisk acceleration is what you're after, the new supercharged version of the engine makes this Jaguar into one very fast cat indeed, producing more power than even the V12.
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