The 2018 Hyundai Sonata Plug-In Hybrid is available as a 4-door, 5-seat sedan. Starting at $33,250, the 2018 Hyundai Sonata Plug-In Hybrid Base is powered by a 2.0L , 4 -cylinder engine mated to an automatic transmission that returns an EPA estimated The top of the line 2018HyundaiSonata Plug-In HybridLimited w/Blue Pearl Interior , priced at $ 38,850 , is powered by a 2.0L , 4 - cylinder engine mated to an automatic transmission that returns an EPA estimated