The hosts trail Australia by 230 runs after closing the third day's play on 297-7, but Bell, who made a first innings total of 60 before being dismissed by Ryan Harris, has not ruled out an England victory.
"All results are possible here at the moment," Bell told Sky Sports News ahead of the fourth day.
"The longer you go into a test there's going to be more of a test for the batsmen and a bit of bounce. Let's just see what happens."
Bell has now scored 377 runs in five innings in this Ashes test.