well it really depends on what type of motor you have, if you have a electric motor that is brushless than the fastest i heard of is about 160-180 km/h which is really fast and petrol engines is about 180-200 km/h so if you could you can go on a track and literally race your car with an RC one but don't it's not safe. But one downside to a really fast RC car is that the tyres on it might son be super strong and the will expand and come of the wheels but if you have the right tools then you will get the job done.
so if you have an RC car keep on playing!!!
It is quite fast for the average RC car except for now there are RC cars are available to go 100 MPH
about 50
About 20mph out of the box
2344567
There are thousands of rc subaru rally cars so it is nearly impossible to know
40
About 60 to 70 mph
Watch it
Go fast and don't stop and DONT let it get submerged. Also you shouldn't put any RC car in water that is deeper then the height of the wheels or the clearance of the chassis to be safe.
as fast as you can make it go or if you get pulled along by a car on 1 you can go as fast as the car can go
65MPH
100 mph