The Portuguese manager refused to compare his current side with the team that won the title in 2005.
The Blues beat Crystal Palace 1-0 on Sunday, courtesy of Eden Hazard’s goal, to seal their first title in five years and the first of Mourinho’s second stint in charge at Stamford Bridge.
It has been an impressive season from the new Premier League champions, with them having led the way since the beginning of the season.
However recently a run of 1-0 wins has seen them labelled as boring, with some saying they are not as good as that original title winning side. Mourinho though, refused to compare when asked the question.
"I don't compare with the past,” he said.
“I can say it's very difficult, because the Premier League is changing and everything gets stronger, it's impossible to be beat some teams 8-0 or 6-0.”
The Portuguese boss also admitted that the Premier League is still his favourite, despite having worked in Europe’s other top leagues such as La Liga and Serie A, where he enjoyed similar success.
He admitted that there would be an attraction for some managers in finding a less competitive league, but instead says he decided to return to a difficult job at Chelsea.
"The English game is still my favourite,” he said.
“I could be smarter and like other mangers choose teams and countries where it's easy to be champions. I choose a country where it's difficult to win and a club without a big tradition of winning Premier League titles. I choose a difficult job."