Well, not to detract from your impressive list, but if I picked BMW alone (since that's my bag), then there's probably 30-40 cars that aren't there, probably more if you intend on listing each engine/body style/series combination. There would also be a lot of race-cars you could add-on. ..... Also, in BMW-speak it's easier to identify models by the E and F codes, rather than model years, I suspect it's the same case for other manufacturers too - like Merc W codes.
I guess it depends how extensive you want the list to be.
edit: also BMW Alpina... which should probably just be Alpina (since it's actually Alpina Burkard Bovensiepen Automobiles)
edit 2: So, I just thought I'd look into how many extra models there may be. I started with the E87 1-Series ('04-'11), of which there are 15 different models, this only takes into account the different engines that were offered, not the necessarily the facelifts, and not counting the the trim packages (M-sport, Ed, SE etc...) - now the E87 is just the 5 door 1-series... there's also the 3 door, the Coupe and the Cabrio, as well as a couple of special editions, a factory customer racer, and probably a couple of other notable racing versions... I think your list has about 15 across the entire line-up?
Like I say, I'm not trying to pick holes in your list, it think it's great, I'd be more than happy to add/update the bits that I know anything about.. but how concise do you want it to be?
I have stacks of books on obscure cars, now I'm finding myself looking for gaps in the list
Wikipedia would fill in some blanks, sure the information might be questionable but it will usually list models easily.
