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Kia/Hyundai 2.0 Liter Engines

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68 KH20L 111722

ABOUT THIS ENGINE

The Kia/Hyundai 2.0L (Theta) is a 4-cylinder inline piston engine, designed specifically for cars from the Hyundai Motor Company.

The base engine consists of an all-aluminum cylinder head and block, dual overhead camshafts with timing chains, and has continuously variable valve timing (CVVT) on the intake side. The engine has a displacement of 122 cubic inches (1,998 cc), a bore and stroke of 3.4 in x 3.4 in (86 mm x 86mm), weighs 295 lbs, and delivers a power output of 142 to 149 horsepower at 6,000 rpm and 138 to 143 lb-ft of torque at 4,000 to 4,250 rpm.

The Kia/Hyundai 2.0L first debuted in the fifth-generation Sonata sedan in 2004, initially in South Korea, before making its North American debut a year later. It was then used in the second-generation Kia Optima and Carens.

In 2007, Hyundai introduced a new generation of the 2.0L (Theta II), which added CVVT on the exhaust side, and produced 163 horsepower at 6,200 rpm and 145 to 146 lb-ft of torque at 4,500 to 4,600 rpm. This engine was used in the Hyundai Sonata and Tucson, and the Kia Optima, Forte, and Sportage.

A turbo variant of the 2.0L (Theta II Turbo or 2.0T) was also produced, which changed the CVVT controls from hydraulic to electronic, and produced 240 to 274 horsepower at 6,000 rpm and 269 lb-ft of torque at 1,750 to 4,500 rpm. The 2.0T was used in many Hyundai applications, including the Genesis, Sonata, Santa Fe, and more recently, the Elantra N and Kona N—it was also used in the Kia Optima, Sorento, and Sportage. Unlike the previous iterations, the 2.0T has been subject to recalls due to engine failures caused by initial manufacturing problems, but thanks to Fraser’s remanufacturing, the engine is now more reliable than ever before.

Overall, the Kia/Hyundai 2.0L delivers a good balance of performance and fuel efficiency.