De acordo com a wikipedia , os cineastas decidiram
The specific choice of vehicle was a DeLorean DMC-12 for the purposes of it looking like an alien spaceship due to its characteristic gullwing doors.
Existe alguma razão dentro da história (quadrinhos, desenhos animados, videogames, cenas deletadas) que explica por que Emmett Brown escolheu aquela marca e modelo em particular?
Eu acredito que a razão do enredo é que Doc achou que DeLoreans era estiloso:
Marty McFly: Wait a minute, Doc. Ah... Are you telling me that you built a time machine... out of a DeLorean?
Dr. Emmett Brown: The way I see it, if you're gonna build a time machine into a car, why not do it with some style?
Besides, the stainless steel construction made the flux disperal... Watch out!
De acordo com este artigo em backtothefuture.com:
Thanks to the stainless steel construction of the DeLorean, flux dispersal is generated at an optimum level from the Flux Capacitor, providing the entire vehicle and its passengers a smooth passage through the space-time continuum during temporal displacement.
Tags back-to-the-future