2015 Hyundai Sonata Eco Review By Unbranded Editor TestDriveNow.com review of the all-new 2015 Hyundai Sonata Eco by automotive critic Steve Hammes. Published in Car Reviews & Photos, Green Car and Videos 1.6 liter turbocharged 4 cylinder engine2015 Hyundai Sonata Eco7 speed dual clutch transmissionCAR REVIEWdrive timegas mileagehyundai sonataMidsize Sedantestdrivenow