Direct injection, once the domain of luxury and high-performance models only, will soon be available on a humble Hyundai. The South Korean automaker has unveiled its new 2.4-liter Theta II GDI (gasoline direct injection) that will debut in the 2011 Sonata early next year.
With a compression ratio of 11.3:1, the 2.4-liter Theta II GDI delivers ..

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