His 45 minutes lap is a new lap record, but according to Bridge to Gantry, Han reported that he was going slower than he would have liked as the car had some problems. He averaged only 28km/h, leaving the record quite easy to defeat.
He also added on that the going slower than he expected meant that the drive was harder than he would like. By the 6km mark, his shoulder was already hurting and he still had 15km more to go till the end of the lap.
The mini used in the record run was reported to be stock other than a roll cage and a welded differential. Special, solid rubber front tyres with reinforced sidewalls were used too.