Re: Will Audi wheels Fit Vectra?? They are the same stud pattern
Vectra B PCD is 5/110 and centre bose is 56.6mm
Audi PCD's are 5/100 or 5/112 and centre bore is 57.1mm so you would need reduction bolts.
205/45, 215/40, 215/45 and 235/40 are all within the correct tolerances so 235/45-17, having a greater rolling radius, would involve a slight reduction in acceleration time.
ET45 is fine but if these are original Audi wheels they will probably use radius bolts, rather than tapered