Engines with Small, Individual Turbos for Each Cylinder Could Revolutionize Downsizing

– From the October 2017 issue – Downsized turbocharged engines have become a cornerstone in the car industry’s effort to increase fuel economy. And as CAFE stand­ards push us toward a 54.5-mpg fleet average, engines are bound to get even smaller and turbo boost even higher. Such radically downsized engines can be strong at full […]

This Diesel-Powered BMW M550d Has As Many Turbos As a Bugatti

– BMW has concocted a recipe that will have many car enthusiasts salivating: a diesel-powered, nearly 400-hp, all-wheel-drive, quad-turbocharged 5-series that is available as a wagon. It’s called the M550d xDrive, and it joins the V-8–powered M550i as the second M Performance model in the new seventh-generation 5-series lineup. At least it does in Europe, where […]