The Hennessey Venom F5 aims for a 301 mph top speed from its 1,817 hp twin-turbo V8.
Bugatti's Chiron Super Sport 300+ hit a record 304 mph thanks to 1,600 hp from its quad-turbo W16 engine.
The SSC Tuatara's 5.9L twin-turbo V8 allows it to reach a verified top speed of 316 mph.
Despite over 1,500 hp, the hybrid Regera focuses on insane acceleration over top speed.
The Veyron Super Sport used a 1,200 hp W16 engine to achieve a max speed of 268 mph.
The SSC Ultimate Aero briefly held the record in 2007 with a 256 mph top speed.
The Agera RS topped out at 278 mph thanks to its 1,360 hp twin-turbo V8.