Originally Posted by triso07

It would be different if it was the Nissan Z with a 3.0 badge, but the way Nissan does it is different as it's actually part of the naming convention itself. To compound on that it has essentially always risen with each model. It would be an interesting marketing exercise to release a name that goes backwards and is essentially named after pre-existing model.

240Z
260Z
280Z
300ZX
300ZX
350Z
370Z
300Z again?

That's why coupling it with displacement is challenging.

HP is no different as things can get awkward quickly.