Is bigger better?

Ok I had to help my grandmother take a electric drill apart earlier and I was wondering if I put a electric engine in a RC car (providing I can get one that will fit) would it really be better or would the extra weight slow it down so much that it would be just a lit faster than a rc electric engine?

i would strongly recommend against this. these motors are designed for huge amounts of torque and relatively low rpm. you are looking at around 1000 rpm (i think im not sure) compared to 25000+rpm from a hobby motor. the rpm is what gives the car its speed, so if you are looking for speed, i would say that is they wrong tree to go after, and it is in no way worht the motor exchange in a remote control car.