Jmurray, I must correct you on one point, which is that you said the Turbopower 2 Autosense was replaced by the Turbopower 1000 Autosense. This is not so. I don't have the brochures to confirm what I am about to tell you so bear with me as my memory really isn't what it could be. I know for sure that the TP2 and TP1000 went on sale together, so we're alright there. As I remember it, there were two cleaners in the TP1000 range and both of them were duplicated in the TP2 range, the only difference being that the TP2 motor ran at 800watts and the TP1000 at 1000watts.
If I may be allowed to quote myself from another message, Hoover were the market leaders in doing things for the sake of it. I think that is what I said and if it isn't, it is at least what I mean. Such was the similarity of the TP2 and TP1000 cleaners, one could almost imagine a scenario where two Hoover designers fell out with each other over whether the cleaner should have an 800watt motor or a 1000watt motor, and to settle the matter a higher authority rolled his or her eyes, banged their heads together, and told them to make one of each and stop moaning about it. I joke, yet I can think of no other reason for the two ranges, though I have to stop and remind myself that in the UK Hoover led its self to it's slow & painful death over those airmiles, and you can't find reason in anyone who did the likes of that.
One thing I would like to suggest is that the TP1000 may have been intended to be Hoovers flagship model, as this was the cleaner which featured in the television commercials at that point in time. For me the TP2, TP1000, and TP3 were far superior to a lot of the competition, especially the Electrolux Contour ranges.