2006-11 Hyundai Elantra There's a fairly significant difference between the Elantras made before 2010 and those that came after. The Elantra's fuel economy has increased significantly, jumping from 26 miles per gallon in 2006 to 33 miles per gallon by 2011. Its 2.0-liter engine and 135 horsepower also got a much-needed makeover, trimming to a 1.8-liter but bulking up to 148 horsepower. The best part, however, is that most of these Elantras will still be covered under Hyundai's 10-year, 100,000-mile warranty. This five-passenger ride is popular enough, but the continued coverage only makes it more coveted.