The 26-year-old claimed the Brazilian side were not only stronger City, but also superior to the Real Madrid side of David Beckham, Zinedine Zidane and Raul that Robinho twice won La Liga with in 2007 and 2008.
Neymar (18), Andre (19) and Paulo Henrique Ganso (20) have established themselves among the hottest properties in Brazil in this year.
"All these players have the talent to make history, they have the talent to win the title," said Robinho.
City's British-record £32.5million signing from Madrid is due to return from his loan spell in August, but Santos and Robinho are keen to extend the deal to at least the end of the year if a way to finance the deal can be found.
City have first-refusals on Neymar and Ganso for the duration of the loan.