A Citroen Racing Formula E car during pre-season testing ahead of the 2025-26 ABB FIA Formula E World Championship Independent Photo Agency/Alamy With their sleek lines, smoking tyres and thunderous engines, Formula 1 cars have been the fastest road vehicles for the past 50 years. But electric vehicles may soon become the quickest on Earth, as the battery-powered cars of the upstart Formula E racing championship are making huge technological strides. Formula E has just unveiled its generation 4...