The DeLorean-inspired car in Grand Theft Auto Online is the Imponte Deluxo. It is a fictional vehicle based primarily on the DeLorean DMC-12, the stainless-steel sports car made famous by the Back to the Future films.
The Deluxo borrows the DeLorean’s wedge-shaped body, gull-wing doors, low profile, and angular 1980s styling. GTA Online adds a distinctly exaggerated twist: the vehicle can switch into a hover mode, allowing it to glide above the ground and over water. That ability evokes the flying DeLorean from Back to the Future Part II rather than the real DMC-12’s conventional road performance.
The Deluxo was added to GTA Online with The Doomsday Heist update in 2017. Its hover capability makes it useful for crossing difficult terrain and reaching places ordinary cars cannot, although it is not the same as a true aircraft and behaves differently from dedicated flying vehicles.
The Scramjet is a rocket-powered sports car, the Toreador is an armed amphibious vehicle, and the Oppressor is a weaponized hoverbike. All are unusual vehicles, but Deluxo is the one specifically associated with the DeLorean design and time-machine parody.