Short answer: not yet. Since 2019, the Bugatti Chiron Super Sport has been the only car proven capable of more than 300mph, but the Koenigsegg Jesko and Hennessey Venom F5 could yet beat it. Speeds like these pose engineers a stern challenge in terms of power, aerodynamics and even tyre wear, so it’s hugely complicated and expensive to achieve even a small gain.But still manufacturers keep trying, so the prospect of a 400mph hypercar is a very real one. Just one that we’re not going to see any time soon.