On paper, BMW's quad-turbocharged 3-liter inline-six is downright otherworldly, delivering a worthy predecessor for the current tri-turbo N75S animating M50d models. But what about the real world? You ...
With the VW emissions scandal still fresh in mind, potential bans for diesel cars on the horizon in European cities and improvements being made to compact, efficient petrol engines, it's fair to say ...
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