13.5
divide the cc by 15 to get the horsepower.
There isn't a formula for equating horsepower to displacement. That'll be determined by the injectors, the displacement, stroke, and compression of the pistons, and other factors.
14 hp in 420cc you take 420cc devide by 30 = 14hp
17.5
420 cc how fast
Roughly 16.5 HP
It is a 420cc motor. Such as a Honda Fourtrax "400" is a 400cc.
I could be anywhere from 10 to 16 hp. Determining factors: compression ratio, bore and stroke combination, cam profile, carburetor and exhaust system. All these thing play an important role in determining the horsepower. I've pulled nearly 30hp out of a little 212cc and seen some 420s fall on there face at 10. If you really want to mod a 420 you can easily get over 100hp. Just depends on all the above factors mentioned.
I have had mine up to 55 mph on a paved road. =)
A 420 is slot bigger and is slot faster and also more expensive
340 Horsepower 340 Horsepower