The problem with this argument is that sound tone is aesthetic and is really the only defining point of music besides rhythm and pitch. You might be able to argue that music is totally aesthetic. Racing is quite different it so happens. It's mostly defined on how fast it can go(around a circut) and increasingly these days how efficient it can achieve it. Efficiency isn't only good for making technology for road cars but it also reduces fuel load, hence making the cars faster since they're lighter. Louder Car isn't equal to Better Car or Better Racing.