But the 'general consensus' doesn't apply to the warm climates such as Singapore and Australia. In these warm or hot countries, the official change interval is reduced by Alfa Romeo. I remember that on previous discussions on this on here the interval is three years, perhaps someone can confirm this.
Change the cambelt, tensioner, and the two idlers. The idlers have been known to cause trouble. Change the waterpump. On the V6 2.5 and 3.2 engines this has plastic impellers, and are known to split/melt. The trick is to replace with the metal impellar from the 3.0 GTV/Spider 916 Alfas.
If you have the same running gear since new (2004), then honestly, please disregard the mileage, you will be sitting on a potential timebomb if this isn't changed asap on purchase.