How was gatsby car a reflection of his personality?

Gatsby's Rolls-Royce comes to represent Gatsby in its unique opulence.

It was a rich cream color, bright with nickel, swollen here and there in its monstrous length . . . and terraced with a labyrinth of windshields that mirrored a dozen suns.

It is lavish to be sure but also stands out from the other cars, bought with old money, that look like the establishment in East Egg.