Koenigsegg Regera

Hybrid powertrains used to always tag vehicles as optimized for fuel efficiency. But that’s changed in very pronounced ways the past several years, as the fastest supercars in the world--from McLaren, Ferrari, and Porsche--have all adopted some form of hybrid technology that helps with acceleration and performance. ALSO SEE: Kids React To Tesla Model S P85D 'Insane' Mode Launch: Video Shows How Fast It Is And increasingly, with models like the McLaren P1 and Porsche 918, automakers are showing how wealthy owners can stay electric-only and free of tailpipe emissions for lower-speed use...