Carrera Pro-X allows up to four USER-controller cars.
You can have as many ghost cars on track as power will supply. So you could have four people racing with four ghost cars.
The ghost cars seem to switch randomly about 1/3rd of the time. Sometimes they will collide with one another, but usually one set on a higher setting will manage to pass.
The approximate speeds of slow/medium/fast settings are 30%, 40%, and 50% of full throttle respectively. They are close enough in speed that if they rear end one another they will not deslot and eventually the faster one will pass.
You can have as many ghost cars on track as power will supply. So you could have four people racing with four ghost cars.
The ghost cars seem to switch randomly about 1/3rd of the time. Sometimes they will collide with one another, but usually one set on a higher setting will manage to pass.
The approximate speeds of slow/medium/fast settings are 30%, 40%, and 50% of full throttle respectively. They are close enough in speed that if they rear end one another they will not deslot and eventually the faster one will pass.