2011 Hyundai Sonata 2.0T
With the Sonata 2.0T, Hyundai demolishes the notion that high fuel economy entails low performance. By pairing twin-scroll turbochargers (which reach peak performance quicker than a conventional charger) with a sophisticated direct-fuel-injection system, the 2.0T wrings 274 horsepower out of a relatively small 2.4-liter, four-cylinder engine—more total horsepower than any V6 in its class. Yet the Hyundai also ekes out 33 highway mpg. From $24,865.
Buick is doing the same thing in the LaCrosse model.
@Boomshadow Not really. The Buick is included in the less horsepower V6 class-- 3.0L 255 hp V6 standard with 17/27 mpg or the 2.4L 182 hp four-cylinder with 20/30 mpg. Not the same thing.