Despite the new 911 Turbo’s wider dimensions and larger wheels, Porsche managed to retain the drag coefficient of the previous 911 Turbo while also increasing downforce. Increased downforce keeps the tires on the road, resulting in better handling, even at higher speeds. This was accomplished by tweaking the body and trim, and adding things like a new spoiler lip on the front air dam and changing the shape of the air vents that cool the brakes and engine.