I can only assure u, that tornado xp (atomic warhead) can do much more than 45kph. I will prove it soon by making a movie of my car going 40 or 80 meters and then measure exact time. I did some tests with my ELECTRIC car and it actually does 36kph (on 5 year old battery). I am sure tornado xp will do 60 kph, but as soon as i have proof (in a weeks time) i will post it on this forum . And for the 1 speed tranny i have to disagree, i drive my car on 2nd gear (1st is stripped) and on some sand it still spins 4 wheels spreading sand on all ppl watching . Car can have 1 speed tranny and do 70mph, but it will have poor acceleration. All depends on actual gear ratio, if u have 1 speed in your car geared like 2nd gear in a 2 gear tranny it will go as fast as the other car with 2 gears .