Ronaldo's name is still sung at Old Trafford over three years after he left the club.
"The Real Madrid crowd are unforgiving," Neville said.
"They spent £80million on him but look at the contribution he has made. He is scoring more than a goal a game.
"He is in the same bracket as Messi and you can put them both up there with Pele and Maradona. I don't get emotional about these things but I feel privileged to have played with him."