Excluding the modern common rail diesel motor, BMW hasn't worked with the turbocharger since the time of the hair-raising 2002 Turbo and the Brabham/BMW F1 car of the early 80s. So far it's managed to avoid forced aspiration in all of its gasoline-powered vehicles, opting for lag-free advancements in performance and fuel-saving technology through good 'ol ingenuity and countless hours of research and development. Therefore it comes as a great surprise that rumours run amok that the German brand is considering turbochargers for a new range-topping inline-six engine.