Premium and 2010 Mercedes-Benz E550 Sport. The 2009 BMW 550i is widely regarded as the benchmark among sporting luxury sedans with its imposing modern design, 360-horsepower 4.8-liter V8 and legendary sporting dynamics. For a car that's been around for five years, its reputation remains consistently impressive. All-new in '09, the Jaguar XF now is available in a midlevel model, and this Jaguar XF Premium includes not only a new 385-hp direct-injection 5.0-liter V8 but also more standard ...