Definitely not a super car... Doesn't include the price tag, the exclusivity, or even the performance. If you think about it, modern supercars are 3.5 second 0-60 cars and even the fastest of E46s can't hit those marks. When you also include the lack of track ability, it really starts to hurt any claims of "supercar" status.
That said, a stage 2 AA or HPF is a sick car.