"At some clubs you do not have to change mentality," explained Mancini to the Daily Mail.
"For Carlo Ancelotti at Chelsea it was already there. Chelsea have been at the top for so many years. They have the mentality that we need here, because when a club has been happy to play for the middle of the table, or just to survive, it is difficult.
"I am the same; but then when you win and you think of all you have done with your staff and your players, it must be a fantastic situation. I tell the players it is important we stay near the top of the table because anything can happen the year after the World Cup.
"At the moment, Chelsea are the best team, but they must play Champions League every week and it could be difficult come February; it depends on us to be there when that happens. From the time when I came here we have improved: a lot. In five months we now play more like a team but we are maybe 50 per cent or 75 per cent there, not 100 per cent yet.
"We have six England players at Manchester City. Some of them are still young and can change their mentality to improve. Adam Johnson can become a stronger player in the future by doing this. Right now, some players, they come, warm up, play the match and then gone.
"They need to learn from those who treat even the training days like it is a match; they are here one hour early, they are thinking of the job all the time and when they finish they stay for massage to be ready for the next day and then just go home, relax and start thinking again. That is what I want to be normal for my players, but it may take one or two years."