Arsene has been there for 1,000 games which is absolutely astonishing."
Dein is certain, however, that he has the passion to stay on, adding: "He still has the fire in his belly and wants to win every game.
"Whenever he decides to leave he will be leaving behind a phenomenal state of the art training facility, a wonderful stadium, a very good squad which he is trying to improve and a legacy of what he's won.
Wenger is yet to agree a new contract his current deal expires in the summer creating some uncertainty over his future.
"It's a phenomenal milestone; 1,000 games at one club for 18 years.
Dein, who helped to bring Wenger to north London in 1996, was speaking exclusively to Sky Sports about the Frenchman who has helped establish Arsenal as one of the most envied clubs in the world.
"We have a ritual that after a home game we go up the road and we normally have dinner together with his wife and my wife but only if we haven't lost. If we've lost he's bad company. It's a monologue instead of a dialogue.
"He has transformed the club, revolutionised the club," Dein said.
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"The other day I said to him you've probably had 1,000 games with other clubs and 1,000 with Arsenal, you've probably had collectively about 2,000 games.
Former Arsenal vice chairman David Dein believes Arsene Wenger will be an 'impossible act' to follow when he eventually calls time on his Gunners career.
Despite not winning a trophy for eight years Dein believes Wenger's record at Arsenal stands the test of time.
"Arsene is a football purist. He has a lovely phrase, he calls it 'possession with progression'.
"He's won three Premier League titles and two doubles in that of course," he said.
"In modern football the longevity in the whole of the 92 professional clubs, you know how long a manager stays in his job for? Eleven months, and Adidas Pure Boost X Vs Ultra Boost
Wenger is preparing for his 1,000th game in charge of Arsenal this weekend Adidas Racer Lite Em Black/Red when the Emirates Stadium side take on Premier League leaders Chelsea at Stamford Bridge in a pivotal clash in the title race.
"I would go on record and say I don't think we will see that again in our lifetime," he said.
"Four FA Cups, he is the longest serving managed in the Premier League today and he is if I'm not mistaken been manager of the month 13 times which is in itself more than anyone else other than Sir Alex Ferguson, so he leaves behind a phenomenal legacy of what he has achieve on the pitch but also off Adidas Jeremy Scott Bear Gold
"Arsene Wenger transformed the club on the pitch and off the pitch. I will go on record as saying he won't be a difficult act to follow, in my opinion it will be an impossible act."
managers to be given very little time to improve a club's fortunes, Dein does not expect another boss to come close to matching his record.
David Dein pays tribute to Arsene Wenger the 'football purist'
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