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Hyundai is relatively inexperienced when it comes to turbocharging gas engines, and that showed with the company's last boosted powerplant, in the Genesis coupe. In addition to providing relatively tepid performance, the coupe's turbo 2.0-liter four-cylinder is sluggish and abrasive. While the Sonata 2.0T's engine uses the same block as the Genesis coupe's, the Koreans have made enough changes to craft what feels like an entirely new -- and seriously impressive -- engine.