220mph seems reasonable ! Just getting my new Dials made at Speedy and they have sent this through as a sample,i was just curious as to what it was off as all the Cerberas i have seen were up to 180mph
Originally the 4.2s went to 180 on the speedo, the 4.5s were 220. AFAIK. I believe that once the newer style speedos came in (ie with digital readings) then they all went to 220. So I assume S6s were originally the same as 4.2s but moved at the 'lightweight' stage.