As much as we love wagons, we love hotted-up wagons even more—there’s just something intoxicating about a powerful sports sedan with an enlarged cargo-swallowing space grafted to its rump. Take, for instance, Jaguar’s 2015 XFR-S Sportbrake: The package starts with the beastly 2014 XFR-S sedan, but drops that car’s trunklid and skyscraper wing in favor [...]