Comment Re:Armor (Score 2) 330
Actually electric motors power the biggest machines I can think of, such as draglines, railroad locomotives and ships. The Presidential limo is not designed for a high speed getaway, it is really an armored personnel carrier with a nice paint job. It also doesn't have to go very far. The only time a limo had to go very "fast" was after an assassination attempt, but remember that it has a police escort that will clear all other traffic ahead of it. In JFK's case, speed would have been irrelevant, and in Reagan's case, they still had to drive through Washington D.C. streets which were more of a speed limitation than the limo itself. In addition, there is always an ambulance following the motorcade, so the POTUS would be transferred to it for a medical emergency. (This didn't happen for Reagan since he was shot right next to the limo. His Secret Service agent pushed him in after noticing blood and made the decision to go to the ER immediately.)
Four independent electric motors might actually give the limo more mobility than a single ICE, since all four would have to be knocked out to immobilize the car. They would also be lighter than the ICE. As for power, they could always charge up an electric limo using the APU on board AF1, or just carry additional battery packs. Another option would be to put a turbine generator in the car if extra range were needed, but I seriously doubt the POTUS will ever take a road trip in the limo. Truman might have done it for fun since he liked driving so much, but that was a different time.