Here's the top speed I think each battery is capable of hitting. 60, 60D Currently only able to get to 130 MPH = I think they "Could" hit 140-145 MPH. 75, 75D Currently able to get 140 = I think they "Could" hit 150 - 155 MPH. 90D,100D,P100D Currently able to hit 155 = I think they could possibly hit somewhere in the 170 - 185 MPH Range. Im pretty sure we all know the P cars could go faster.