Although this thread is a bit old, I can advise that Manxlowflyer (see below in thread and many other threads) fitted four Davanti 225/55WR16 tyres to his (and now my) car in June 2022, at 26,101 miles. So, the same tyre all around. The car drives and handles well on these and - now at 30,000+miles, they are wearing well. So that is a potential solution (and means that your spare fits any of the wheels - always a bonus). When compared with SatNav, the speedo reading and mileometer are spot on, right through the speed range (to the legal limit, of course!).