The self-proclaimed Special One led Chelsea to his third Premier League title with Sunday's 1-0 defeat of Crystal Palace.
Ferguson was 51 when he steered Manchester United to the inaugural Premier League title in 1992/93
Mourinho is 52 and has this season's trophy to go along with the 2004/05 and 2005/06 wins from his first spell.
"I have a long way to go, but Sir Alex left the bar in an impossible position for anyone
I cannot win 13 Premier Leagues," Mourinho told BT Sport,
"I can win 13 championships
I can
I have eight, I think I can go to 13
But 13 Premier Leagues, no, no chance."
Mourinho needs four more championships to reach 13, after two wins with Porto in Portugal, two with Inter Milan in Italy and one with Real Madrid in Spain, plus his three with Chelsea.
Source : PA
Source: PA