Plot hole: How can Bumblebee and Optimus already have the car specs and colours before they leave Cybertron for the first time to come to earth? Optimus didn't have this when they came to earth in the first Transformers movie.
Suggested correction: First of all, this might not be the same continuity as the older Transformers films. Second of all, the cars on Cybertron might be Cybertronian vehicles. Optimus scanned the semi in the first film so that he could be a different vehicle than he already was. There is no reason this could not have happened.
I'd like to add that we know for a fact that this is not the same continuity. It is a reboot. See the Wikipedia article.