The sleek design, combined with Hyundai's expertise in interior packaging, has produced an interior that delivers class-leading comfort, functionality and practicality. A sleek roofline typically compromises headroom and interior volume but, at 120.2 cubic feet, the Hyundai Sonata has the most interior volume of its key competitors. It is so spacious, Hyundai Sonata continues to be classified by the Environmental Protection Agency (EPA) as a Large car, truly a "class above" Camry, Altima, Fusion and Malibu (all are categorized as Midsize cars). Even in trunk room, the Hyundai Sonata shines. Sonata's 16.4 cu. ft. of trunk space gives it a 9.3 percent advantage over the Camry, and a 17.1 percent advantage over Accord.

The new Sonata will launch with Hyundai's new Theta II GDI 2.4-liter four-cylinder engine with a Gasoline Direct-Injection (GDI) fuel delivery system, which contributes to improved fuel efficiency and lower emissions. Hyundai Sonata is the first midsize sedan to adopt GDI technology as standard equipment in a naturally aspirated powertain. This shorter, more direct path of fuel delivery, allows for greater control of the fuel mixture at the optimum moment, thus improving efficiency. The fuel is injected by a camshaft-driven, high pressure pump that operates at pressures up to 2,175 psi. Direct injection also utilizes a higher than normal 11.3:1 compression ratio for increased power. The pistons are "dished" to increase combustion efficiency in the cylinder. This powerplant will deliver best-in-class fuel economy, best-in-class four-cylinder horsepower and best-in-class torque.

Hyundai Sonata delivers an impressive 23 mpg city/35 mpg highway estimated fuel economy rating* with the available six-speed automatic transmission with SHIFTRONIC®. (When equipped with the six-speed manual, the Hyundai Sonata achieves an estimated 23 mpg city/34 mpg highway fuel economy rating). The preliminary horsepower and torque ratings for the Theta II GDI are 198 horsepower and 184 lb.-ft. of torque. In the SE trim which includes a standard dual exhaust, the engine delivers 200 horsepower. This high-tech, all-aluminum, 16-valve engine features Continuously Variable Valve Timing (CVVT) on both camshafts and a Variable Induction System (VIS) for better engine breathing. A version of this engine also meets Partial Zero Emission Vehicle (PZEV) standards.

Next year, Hyundai will add a 2.0-liter Theta II turbocharged GDI four-cylinder engine and a 2.4-liter Hybrid Blue Drive model featuring Hyundai's breakthrough lithium polymer battery pack. Details about these powertrains will be announced at the 2010 New York Auto Show. Hyundai Sonata's innovative segment first powertrain lineup is a key driver of Hyundai's goal to be the most fuel-efficient automaker on the planet.