If you have the UK version of the Tab did you not notice in the Samsung Apps list 'Need for Speed Shift'.
It was on my list a couple of weeks ago and as such I installed for my Granddaughter to play.
Need for Speed Shift is probably the best Racing game available on Android at the moment.
If it's not showing in your Samsung Apps list you can still obtain it from the Market.
It's currently being offered for as little as $0.99. See
here for details.