How much faster Bugatti needed to go than Koenigsegg to hit 300mph. Seems simple, right? Add a bit more power, lose a bit of weight, tidy up the drag and bingo, right? The reality is very different. At these speeds, the additional performance needed to gain even 1mph is huge. The velocity of the vehicle and the forces acting on every element of it grow exponentially as the speed increases. Take the wheels, for instance: the rotational force on them creates a gyroscopic effect that could overload the regular steering system (configured for 260mph) to such an extent that if you turn, you may end up unable to straighten again.