A German automaker well known for its heavy duty truck engine parts could revolutionize passenger car powertrains. The Mahle Group is currently showing off a demonstration vehicle with an experimental three-cylinder 1.2-liter single turbocharged gasoline engine that promises to meet tough emission regulations while maintaining performance in mid-sized cars.The Article Experimental Engine May Provide Econobox Mileage and Sports Car Performance appeared first on Automotive Digest.