Without microSD expansion available, the bump in internal storage from 16 GB to 64 GB makes a world of difference. (androidauthority.com)
All in all there are over 150 vehicles from over eight expansions available here, not just cars, but bikes too as well as additional tracks. (dailyjoystickpodcast.com)
There are additional expansions available as in - app purchases as well. (androidauthority.com)