Jaguar’s upped the gusto in the XF Supercharged for next year. The car’s getting a weakened version of the XFR’s mighty 5.0-liter V8. The blown eight-pot serves up a still-potent 470 horsepower and 424 lb-ft of torque. Compare that to last year’s 420 horsepower 4.2-liter, and you can see the difference that .8-liter makes. Aside [...]