Sell it and buy a 1.8t... its already done...
Been discussed a number of times but due to the amount of work involved its cheaper and easier to just buy an A3 1.8t... insurance will be cheaper than an engine swap, and its more than just the engine and a gearbox swap to do... ECU, brakes, immo defeat... etc...
Your choice of course but seeing as Audi have already done it and done it properly its really a no brainer
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