"We're going in, we're going in full throttle, that ought to keep those fighters off our back!"
Star Wars Episode IV: A New Hope
During Luke's attack run on the Death Star during the Battle of Yavin in A New Hope, we see his target computer counting down numbers, presumably distance to the target, until he switches it off.
Do we have any indication of how fast he was flying, either through this or from other clues?
Was that any different from the speed of the group of Y-wings or the first group of X-wings?