The Indian superstar was asked the curly question at Lord's during a press conference to promote his autobiography Playing It My Way.
"I've never believed in comparisons," the 41-year-old replied on Friday.
"I've believed more in players serving the game.
"Sir Don served the game in the 20s and 30s and also part of the 40s to the best of his ability and people still talk about it."
Tendulkar said no cricketer played the sport forever so his advice was to set a good example for the next generation.
"You only look after this sport for a while then pass on the baton to someone else," the former India captain said.
"So make sure that you look after it in the best possible way that people can be proud of you. That's what I've done."
In his autobiography, Tendulkar recalls visiting Bradman's Adelaide house in 1998 with Shane Warne.
He asked Bradman how he thought he'd have coped in the contemporary game.
"He said that he didn't think he would have scored quite so many runs because of the more defensive field settings that are used nowadays," Tendulkar writes.
"He also said that the standard of fielding was much better in the contemporary game."
Tendulkar and Warne then asked Bradman what his test average would likely have been if he was playing then.
Bradman replied: "Around 70."
"We were slightly surprised and asked if he was sure it would be so much lower than his famous career average of 99.94," Tendulkar writes.
"He said, 'Well, 70 isn't bad for a 90-year-old!"
Tendulkar, who retired last November, averaged 53.78 runs in his record 200 test.
