The 2015 Hyundai Sonata Hybrid is available as a 4-door, 5-seat sedan. Starting at $26,000, the 2015 Hyundai Sonata Hybrid Base is powered by a 2.4L , 4 -cylinder engine mated to an automatic transmission that returns an EPA estimated 36-mpg in the city and 40-mpg on the highway. The top of the line 2015HyundaiSonata HybridLimited , priced at $ 29,500 , is powered by a 2.4L , 4 - cylinder engine mated to an automatic transmission that returns an EPA estimated 36-mpg in the city and 40-mpg on the highway.