I am looking at buying some genuine Fiat Alloys to fit a Fiat Bravo 07 1.4 active. The wheel have come off a Bravo sport and tyre size is 225/45/17. Is there any special bolts i need or just the standard Bravo bolts for alloy wheels?

Check the lengths carefully, but as long as they're bolts for that wheel and car, I can't see any problems.

With wheel/tyre combination of that size and weight. I'd consider a stud conversion.

Do make sure -- actually try it -- that your old space saver will fit OK with the new bolts (if not, remember to carry the old ones with you).