The requirements list that this game is compatible with the iPhone, iPod touch and iPad. Here is a recent comment on the app link where someone gave it 2 stars for the iPad.
This is NOT an iPad app -- iPhone / iPod at 2x only
by Ross Garber
The game may be cool, but using the iOS 2x scaling really damages the quality of the game, not to mention to credibility of the developer who claims this is an iPad app.
It seems that ths game looks awesome on the iPhone and is a substantial improvement over the first version. But I will likely wait for the iPad version to be released. Likely called Real Racing HD 2...
The price is the same, and is available for $10 from the App Store for Real Racing 2.
Drop a comment if you tried it out on your iPad!