There was an arcade video game in the 1980s called Altered Beast (which is currently available to play on the iPhone and iPad), and in it the player plays a character who changes into a bigger, steroided-out looking, bigger and more muscular version of himself, and then he changes into a monster, fighting other monstrous opponents. And in this proposed ad for the Fiat 500x, we would see the character in the video game be a car (a Fiat 500, in fact), fighting monster trucks. And the Fiat 500 would change into the 500x, a more muscular version of the car, and as it defeats the monster trucks in video game play, the announcer would say that the 500x is the “altered beast” form of the Fiat 500.
(This concept would also work for a more souped-up, muscular version of any model of car.)
This is Altered Beast, for those who are unfamiliar with the game: