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The new 2011 Hyundai Sonata offers an unprecedented combination of segment-leading fuel efficiency and power – with an estimated 34 mpg highway rating, and 274 horsepower. Remarkably, the Hyundai Sonata 2.0 Turbo produces these industry-leading metrics on regular fuel…premium fuel is not required.
It’s thanks to the addition of the all-new 2.0-liter Theta II turbocharged GDI engine. The new Hyundai Sonata is the first Hyundai vehicle to have both GDI technology and a turbocharger. By the end of Hyundai’s 24/7 version 2.0 product initiative four nameplates will be available with GDI or the combination of GDI and a turbocharger. The 2.0-liter turbocharged GDI four-cylinder engine in the 2011 Sonata produces 274 horsepower at 6,000 rpm and 269 lb-ft of torque from 1800-4500 rpm with regular fuel. The Hyundai Sonata 2.0T will deliver 22 mpg city and 34 mpg highway.
Many of the advantages inherent in this car, twin-scroll turbocharger designs have two exhaust gas inlets divided by split walls inside the turbine housing, with both gas passages controlled by a waste-gate. The result of this superior scavenging effect from a twin-scroll design leads to better pressure distribution in the exhaust ports and a more efficient delivery of exhaust gas energy to the turbocharger’s turbine.
Two key features of Hyundai’s twin-scroll turbocharger setup are:
The stainless steel exhaust manifold and the twin-scroll turbine housing are cast in a patent pending one-piece design
The waste-gate for the turbocharger uses a motor-driven electrical controller instead of being mechanically controlled
