For balancing power and fuel efficiency, the 2015 Kia Optima engine is praised. The 2.0-liter turbocharged option offers an exciting 274 horsepower for those seeking more excitement, while the regular 2.4-liter engine delivers solid daily driving with an EPA-estimated 23 MPG city and 34 MPG highway.

With a 2.4-liter engine and electric motor, the hybrid version offers drivers who care about the environment remarkable fuel savings of up to 40 miles per gallon. With these choices, the 2015 Kia Optima engine selection is adaptable to a variety of driving styles and lifestyles.