The former Brazil striker insists the Barcelona attacker still has some way to go before he can claim to be on the same level as his World Cup-winning self
Neymar, 21, has received widespread acclaim for his performances for the Selecao and has made a promising start to his Barca career following his €57 million (£50m) move from Santos this summer.
However, Romario, who is regarded as one of the greatest strikers of all time, winning the World Cup with Brazil in 1994, insists it is too premature for Neymar to be compared to him.
"Neymar is playing well and will be a huge star in the future, but it is too early to compare him with me," he told Brazilian newspaper O Dia.
"However, if he continues to play at this level, then, who knows, you could even say he will be better than me when his career finishes. Today he is not."
Meanwhile, Romario has had a change of heart on Brazil's chances of World Cup success next year.
"World champions for the sixth time? I hope so. If you had asked before the Confederations Cup I wouldn't have asserted that, because the team was playing very badly," he added.
"[Luis Felipe] Scolari has managed to convey the idea to the players and they will understand what he wants. Now I see Brazil, Germany, Argentina and Spain as favourites."