afaik most of the vehicle stuff uses physx but don’t quote me on that, so far we haven’t had much chance to play with vehicles in UE4 beta as we were having some issues and to be honest most dev’s aren’t interested in them, if the engine side stays as we have seen then it’s going to be quite a bit more work than in udk, i have been hoping for more vehicle examples but we’ll have to wait and see.
i’ve played a few non unreal game with vehicles and to be honest not really impressed but i do release that it is very difficult to get just right, i hope to have a quick video run though once my access is sorted and then later a mini series with blender to ue4