Formula One cars usually race at over 300 kph. Without aerodynamic downforce, racing cars have sufficient power to fly once they exceed 160 kph.
Small planes can take off at slower speeds than F1 cars travel on the track. However, the downforce provided by their wings keeps them on the track. The car wings can produce amazing aerodynamic downforce. When a car is traveling over 160 kph, it can generate enough downforce to hold itself to the ceiling of a tunnel and drive upside down.