At the turn of the 20th Century electric cars were the kings of the road until petroleum engines became viable, but they may soon take that crown back. Companies like Tesla, Volkswagen and BMW are developing new and improved hybrid and electric cars which will hopefully ease our fossil fuel dependence. Leaders in self-driving cars such as Google and Uber also use them, in part for their cheaper and greener running costs. Although currently only 0.1 per cent of cars on the road are all-electric, we may all end up driving down electric avenue(s) eventually.
Electric motors are more efficient at slower speeds and petrol at higher speeds, but most of all when they work together.