B5 Audi A4 were PCD 5x112 i'm pretty sure whereas the Bora is 5x100 so the PCD is actually wrong and they won't fit without adapters or redrilling.
In regards to the width question without knowing the ET and rim width we can't help you with whether they'll rub or not on your car. It's not like the A4 came with only one set of wheels so yeah it's impossible without more information.
Cheers,
Trent
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