Relevant as in, yes, current, but also something that is unique to the series but has never featured. I did mention about including a Z1 which is not a current model, but, in my opinion, would be relevant to players since it is not only a new unique model but also a rather interesting piece of BMW car history.
I mentioned the time piece because the Z4 of that model was represented as BMW's current line up along with the 120d and 120i in Gran Turismo 4. I just don't see it as something very interesting nowadays, especially when we don't have the current Z4 to go along with it so that at least we could have some modern representation of how BMW is like today.
The Peugeot is a great addition because we've never really had a car like that in Gran Turismo yet. Something popular from the older games like an older Supra racecar would be great since it's an icon of the series, now re-done in 4K. An '03 Z4? Maybe I am not the target for this, but I just can't find the appeal of it personally, especially when these models take so long to make nowadays.