[mrceej]

Actually they came as 240Z, 260Z and 280Z depending on year. I don't know what the actual cutoff years are for each, but it's pretty much in that order. That's how nissan did it here, they called it the 240Z, 260Z, 280Z, then the next body style was 280ZX, followed by 300ZX, and currently 350Z, all in reference to the engine size.