In its sixth-generation, the supermini has a frontal area that is significantly smaller than its predecessor’s, allowing the new car to improve its fuel consumption and emissions to new levels.
Things that helped achieve the those impressive drag coefficient numbers include the use of an flat underbody panel that covers the engine compartment to the rear axle and a roof spoiler which improves airflow and reduces drag-inducing turbulence. The aforementioned spoiler has also been worked on to cut aerodynamic lift on the rear axle, thereby improving high speed stability on the Autobahn.
Last but not least, the Corsa has also been equipped with an active grille shutter that is usually seen on more expensive cars from higher segments. When the engine is cooled sufficiently enough, the front grill closes which in turn redirects airflow around the front of the vehicle and down the sides, rather than through the engine compartment. The decision to open or close the shutter is made automatically, depending on engine coolant temperature and speed.