First Drive: 2016 Hyundai Sonata PHEV and HEV
Green Car Congress
MAY 26, 2015
Hyundai unveiled the first generation hybrid Sonata in 2010, with a 2011 market introduction. The second-generation hybrid system has been thoroughly enhanced from its predecessor: The downsized GDI engine features an aluminum block and head, a compression ratio of 13.5:1, Earlier post.).
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