The car is longer, lower, and wider than the last generation and has the lowest coefficient of drag of any production passenger car. (bestride.com)
The smooth, rounded shape of both cars gives them a very low coefficient of drag - the amount of resistance the car generates against the wind as it rolls down the highway. (articles.orlandosentinel.com)
Much more important to energy efficiency is the total drag, which is calculated as coefficient of drag times frontal area. (insideevs.com)