However, that was not the original notion of what that film’s time machine would be. Do you know what it was?
Answer: A refrigerator.
More precisely, in the first draft of the screenplay the time machine was a laser device housed in a room, and subsequently attached to a refrigerator. Director Robert Zemeckis chose to scrap the idea because he feared that children might start climbing into refrigerators and getting trapped inside.
The Delorean entered the script in its third draft, chosen because its gull-wing doors would give it the look of an alien spacecraft, which it would be assumed to be in the year 1955.