We visited this museum a few weeks back when we were in Turin, although quite small and only Fiat exhibits well worth a visit. I didn't
realise Fiat were involved in all forms of transport not to mention domestic appliances too, there is even a Fiat washing machine on display! It's also free admission and reasonably easy to get to in the centre located at the top end of Corse Dante which runs down to the Po River.
We also went to the revamped Biscaretti museum, completely different to how it was at the centenary trip. Not so many cars on display
now but more themed areas, it was redesigned by the same person who did the Cinema Museum (still one of my favourite ever museums) so plenty of use of animated backdrops etc probably more suited to the casual visitor rather than true petrolhead but enjoyable nonetheless. Incidentally as you leave the exhibition there is a large 'touch screen' which shows all the cars on display and you can vote for your favourite and even before we voted (x3) the integrale was tops!
Steve