Electric engines predate combustion engines, and propelled more cars in the early years of the automobile than gas or Diesel motors. What if there were no oil? We might have roads with electricity supply installed in them, cables and contacts, much like for trams or trains, but underneath. No batteries. An electric engine producing 1,000hp and 1,000 Nm of torque is a lot simpler, smaller, lighter, durable, and cheaper than a combustion engine of the same power. We could go at 300 mph routinely, if we had not taken the wrong turn with oil.