The tyres would be way too big.
Ideally the tyres should be 195/40 17s, but as these are very expensive most people make a small compromise and get 205/40 17s.
215/45s would throw the speedo out loads, make the car very slow, and probably would be too big to fit on in the first place.
If the tyres are in good nick, why not flog em on 'bay, and put the money towards some 205/40s?