subject: The Fuel-efficient 2010 Kia Forte 2.0-liter Engine [print this page] For 2010, Kia's compact Spectra sedan has been replaced by an all-new model called Forte, powered by two new Hyundai-designed four-cylinder engines.
Both Forte engines are part of the Theta family, developed as a joint venture between Chrysler, Mitsubishi, and Hyundai, which owns a minority interest in Kia. Both are all-aluminum, 16-valve inline fours, with chain-driven dual overhead cams and variable intake valve timing. They replace the older iron-block Beta II engine used in the 2009 Spectra.
LX and EX Fortes have a 2.0-liter version of this engine, with 156 horsepower and 144 lb-ft of torque, up from the Spectra's 142 horsepower and 137 lb-ft. In states with California-style emissions standards, the new engine is rated at 154 horsepower and 138 lb-ft of torque. Optional on EX models is a Fuel Economy Package that includes electric power steering; a smart alternator that operates only when needed; and various drivetrain and tire changes for better gas mileage.
The Forte SX uses a 2.4-liter version of this engine, with a larger bore and longer stroke. It is rated at 173 horsepower and 168 lb-ft of torque, 165 horsepower and 161 lb-ft in states with California-type emissions.
On paper, both Forte engines produce more power than rivals like the Mazda3 and Toyota Corolla. In the real world, their thrust is blunted somewhat by tall transmission gearing, although performance remains adequate. Both engines are relatively loud when revved, but quiet at low and mid-range speeds. Some reviewers complain that the 2.4-liter engine has annoying, non-linear throttle response.
The 2.4-liter Forte's EPA estimated fuel economy is better than any of its direct rivals, but the 2.0-liter engine's 28-mpg combined rating is only mid-pack. The 2.0-liter scores better with the optional Fuel Economy Package, which raises the Forte's EPA combined rating to a class-leading 30 mpg.
