The turbocharged engine option continued as the 4G63. It was also updated for more power as compared to the previous generation ( vs ). The naturally aspirated cars had two different I-4 engines depending on the market they were produced for. The US version engines produced 140 hp, found only in the RS and GS trims, and were a modified version of the Chrysler Neon engine, the 420a, manufactured by Chrysler and delivered to and installed at the Diamond Star Motors facility. The European market engines were a naturally aspirated 4G63 with . International market Eclipses made less horsepower than their Japanese domestic market relatives when equipped with the 4G63 (, ), due to emissions regulations at the time.