The Sonata was designed by Hyundai and featured Mitsubishi's engineering, including the platform from the Galant Σ and its 2.4-liter, the mitsubishi designed engines were made under license in Korea, and had Hyundai codes stamped on them, but otherwise were almost identical to motors used by Mitsubishi 110 horsepower Sirius inline-four engine as used in American-market models.