A3 Alloy question

Yes they will fit. I think they should stick out a bit more than your current alloys.
But im sure one of the other guys will confirm all this for you :thumbsup:

Those wheels will be fine. My wheels are 8.5J wide with an offset of ET45, so they are even wider and sit further out than the wheels you mention.
And Ash says, the lower the offset the further the wheels will stick out.

Something you need to think about are the tyres. Do the wheels come with tyres also??
If so, check the tyre size because a lot of wheels off of other models come with the wrong size for an A3.
My wheels are off of an A8 and came with huge 255/45 tyres so had to swap them for 225/40.