4.Bugatti Chiron – 261 mph
To be completely honest, all this mania with 250+ mph or 400+ km/h supercars started with Bugatti Veyron, and while we had fast Lambos, Ferraris, Porsches, and others, this one first managed to break 1,000 hp and 250 mph. All that happened in 2005, and it is time for a successor which comes in the Bugatti Chiron. The same engine but with more power, similar design but with a lot more aggressive appearance is the recipe that the company used and it is no wonder it is capable of hitting 261 mph. One more thing to note, this speed was achieved with the street legal setup, so we expect it to be a lot faster, especially when you see that the next in line is his older brother Veyron Super Sport that has a deficit of about 300 hp over Chiron.