The 8-time gold medalist was doing an interview with Spanish news outlet Marca over the weekend ... when he was asked straight-up -- who wins in a race RIGHT NOW??

"For sure Cristiano Ronaldo," the 34-year-old Jamaican legend says. "For me, he works out every day. He's a super athlete, you know what I mean?"

"He's always on top of his game. He works hard, he's focused. So right now, I definitely think he's faster than me."

With all due respect, Mr. Bolt -- WHAT ARE YOU SMOKIN'!?!?!

Sure, Bolt hasn't raced professionally since retiring in 2017 ... he's the fastest human being of all time. He crushed opponents easily for the majority of his career.

Also, back in 2009 Bolt was clocked at 27.8 mph -- the fastest recorded time in human history!!

Don't get us wrong, Ronaldo is a beast, too -- but he's just not in Usain's league when it comes to running in a straight line.

35-year-old Ronaldo was reportedly clocked at 21 mph during the 2018 World Cup, which is still fast ... but that's still 6 mph slower than UB's top speed.

Even if Bolt has gorged on donuts and milkshakes since his retirement (which he hasn't), we'd still bet on Bolt just from the muscle memory alone.

Also, Ronaldo just had COVID, which certainly doesn't help his chances.

Bottom line ... it's Bolt all day -- unless Ronaldo got a 35-yard head start AND Usain had to run backward.