Four of Floyd Mayweather’s cars burnt to crisp

Floyd Mayweather’s pricey car collection took a massive hit this week — when a trailer transporting Floyd’s Bentley and 2 Rolls Royce whips burned down to the ground … TMZ Sports has learned.

We’re told the truck was transporting Floyd’s rides from Vegas to Miami when something went wrong just outside of Phoenix, Arizona on October 7th at 1:31 AM … and the entire unit went up in flames.

You can see in the pics, the cars were burnt to a crisp — including one of Floyd’s custom Jeeps.

It’s unclear how the fire started — but Arizona State Troopers confirm the incident and say there were no injuries reported.