[73 4V XB]

Any individual tile will move when not glued down. A simple turning of the steering wheel will cause the tiles to move against each other and possibly ride up on the tiles next to them.
Personally, I’d go with the vinyl sheet glued down. It’s easy to cut a square out and re glue it if one or two get damaged. The added bonus of laying vinyl is there’s no gaps for water to under it.