Toure, 27, is confident it will not be long before mega-rich City are being mentioned in the same bracket as the Catalan giants.
The £24million summer signing said: "You cannot compare Barcelona with City right now because Barca are at the top and have top-quality players.
"They have Leo Messi, Xavi, Andres Iniesta and Dani Alves, who are fantastic. But we are still signing new players.
"In a couple of years we could be better than Barcelona. What we need to do is continue to work hard and improve with every game. I keep saying to my brother Kolo and my family that City have great players but we need to continue to work hard to become great."