Boxer Deontay Wilder -- Move Over Floyd Mayweather ... I Got a Gator Skin Lambo!

Heavyweight champ Deontay Wilder wants to be the next Floyd Mayweather Jr. -- and already has a great a record, a title belt, and now he also has a baller exotic car to rival some of Floyd's.

Wilder's defending his PBC Heavyweight title Saturday night in Vegas, and sources close to the champ tell TMZ Sports he'll have a great prize waiting for him at home -- a brand new Lambo Aventador.

We're told Wilder dropped a grip of cash -- $560,000 to be precise -- on the 2015 whip, which retails for a paltry $398k. Wilder jacked up his price with some Alabama custom touches, like wrapping it in gator skin! Relax, it's not real gator ... just a print.

Wilder, known as the Bronze Bomber, also got Michael Koss at Exotic Euro Cars to slap on a coat of bronze. We're told Deontay bragged to Koss, he would knock out his Saturday night opponent, Johann Duhaupas.