So, watching my brother test drive a few things and asking about the details of the tank and the round it shoots. He had to end the test drive to show me. Why not give the same or similar menu opening the map as real battles. So stats and options for the tank can be change. ie: shell type and such
This would be nice, also I think they allow testing of vehicles with locked modules. Sometimes when i test something, ammo and mods are locked which defeats the purpose imho of test drives in some cases.
Not the tank, but the rounds: in the default key bindings for the game, if you hold the ALT key, it will give you a mouse cursor that you can hover over an ammo type on the bottom of your screen and get the stat card for the ammo in-game.
This is also true in real games, not just test drive.