Hart, who will make his Torino debut at the weekend after moving on loan to the Serie A club following the loss of his place at Manchester City, has been England’s first choice since 2010.
But Shilton, England’s most capped player, has advised manager Sam Allardyce to widen his goalkeeping options.
“I’ve never felt he is as good as a lot of people thought he was,” he said.
“Obviously he’s a good keeper but although he has great games, a keeper is judged by the amount of mistakes he makes and those have happened right through his career. In the Euros he made two mistakes in three games.
“What I don’t understand about Joe is that he has 60-odd caps and yet people were saying he was getting too wound up before games in the Euros. If you don’t know what you’re doing after 60 caps, there is something wrong. I thought he was too wound up but apparently that is his style.