Both Audi and BMW have long, storied histories of making powerful six-cylinder engines. However, one of BMW's best was also one that flies a little bit under the radar, particularly in the U.S. — the ...

EcoBoost engines have been integral to Ford's lineup since the 2010 model year, with engines like the 3.0-liter EcoBoost powering a range of Ford vehicles, including the Explorer ST and Bronco Raptor.

Very few automakers have perfected the six-cylinder formula as well as BMW. Even as emissions regulations tighten across Europe, the company has somehow managed to squeeze more power and efficiency ...