Maybe a sub-forum from Random Chat, where people can discuss cars of other motor manufacturers? Ok, so the current system works fine in that people can just post this in the Random Chat section, but a dedicated area for it might actually be quite interesting as a central collection of viewpoints on other cars!
Seen it on a couple of other car forums and it works well.
Also as this forum is a car-related forum, which includes like-minded car enthusiasts as members, I think it could be a valuable addition and spark good conversations!
Up to you Mr PG!