hi a have a 1.8t a3.1997 i have a friend who is selling some 19in alloys from his 2005 a3.could anyone please tell if they will fit my 1997 a3.and if it will make i big difference on my speedometer reading.the wheels on my audi at the moment are only 15inch

 

dude, You understand that 19" will make your ride very hard. the sidewall of the wheel provide some amortization.

but ye sure, they fit. just make sure they are not going to rub anything and the diameter of the assembled wheel is close to what stock is.