KIA ENGINE G4EA.  The Hyundai α-series(alpha-series) is a multi-valve, four cylinder engine family comprising 1.3, 1.4, 1.5, and 1.6L naturally aspirated versions and a 1.5L turbocharged version. Introduced in 1992, this was Hyundai's first engine designed entirely in-house. Design objectives were to provide high performance and good fuel economy with excellent durability at a reasonable cost.


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  • KIA ENGINE G4EAA 1.6 L version was introduced in 2001 and initially sold alongside earlier versions. The 1.3 L and 1.5 L were later dropped. The 1.6 L engine was further revised in 2005 with a 1.4 L version also available for certain markets. Known as the Alpha II it debuted in the Kia Rio JB. Notable features included a DOHC 16-valve cylinder head, graphite-coated pistons, a strengthened cylinder block, ribbed aluminum oil pan, coil-on-plug ignition, an enlarged throttle body (increased from 48 mm to 52 mm), a revised PCM (powertrain control module), simplified and shortened intake ducting, a revised intake manifold, and a returnless fuel system. These improvements further reduced NVH and emissions, with the 1.6 L version becoming ULEV-certified in all 50 U.S. states.In 2011 the Alpha engine was replaced with the Hyundai Gamma engine..