The Jaguar XJ has been around since 1968 and has been Jaguar’s prized flagship for the last 47 years. Over the years, it has seen three generational shifts, if you don’t count the various series’ produced within each generation. The current and fourth generation has been around since 2009, so it’s getting a little long in the tooth. It still looks good, though, and is fairly modern, with an update taking place for 2017 that brought some new technology, a revised exterior look, and a number of new trim levels to choose from. Jaguar has chosen to forgo the generational shift just yet, but for 2018, the XJ does get a new update in the form of a brand new trim level that brings a 5.0-liter V-8 that’s good for 567 horsepower and 516 pound-feet – enough to get the new XJR575 up to its top speed of 186 mph in just 44 seconds while the sprint to 60 mph takes just 4.4 seconds, making the XJR575 the fasted and most powerful road-going production Jaguar to date.