2011 Jaguar XFIntroduced two years ago, the Jaguar XF lineup started a clean break from the overtly traditional Jaguar shapes of the past. Last year, new XF Supercharged and XFR high-performance models were added to the lineup; now for 2011 the XF gets a very substantial 85-hp boost, with a new standard 5.0-liter V-8 replacing the previous 4.2-liter one. Overall, there's nothing heavy-handed or