Coppell hailed Ferguson's capacity to adapt to football's ever changing landscape.
Coppell, currently looking for a return to football management after leaving Bristol City at the start of last season, told the Sunday Mirror: "He is the gaffer. He is the manager in the old sense of the word.
"He has adapted to everything that has evolved in football - transfer fees, Bosman, wages.
"And he still looks as ambitious and as keen as ever. Look at his reaction when United score a goal.
"I was speaking to him recently and he told me: 'The thing in football that makes you old is losing.' Well he must start every season looking to lose five games, max. What a fantastic position to be in. But that is down to his work and his eye for a player.
"The business he did this summer was tremendous.
"Ok, for me there is still a question mark against the keeper David de Gea. He hasn't got the presence of a Peter Schmeichel or Edwin van der Sar and has still to be tested.
"And look what he can do up front Rooney, Berbatov, Hernandez, Wellbeck.
"He has choices all over the pitch - and that is not an accident.
"That is his reward for the way he goes out to choose players that fit into the United way of doing things. And he is the best ever at keeping things under wraps. No-one has any idea of what is going on in that dressing room."