What conditions does a hypercar have to meet to be street legal?The Koenigsegg Agera RS. Top speed: 278 mph (447 kph) ... The Bugatti Chiron Super Sport. Top speed: 273 mph (440 kph) ... The 9FF GT9. Top speed: 272 mph (437 kph) ... The Hennessey Venom GT. Top speed: 270 mph (435 kph) ... The Czinger 21C. Top speed: 268 mph (432 kph)