Erm.. My car is completely standard (apart from a magic tree and Mobil 1 oil). Im now somewhat confused and suprised also.
Confused because I thought this was about right for a 1.6, as I know someone with a 1.4 16v fiesta that does !25, ive read on another forum a clio si (1.4 16v) with picture of speedo reading !25 . I very much doubt that the speedo is acurate in all cases, but I can say with absoulte certainty that my speedo was reading over !30 on a flat straight on this particular evening, my mate, who I was following confirmed this speed to be about right although he was pulling away at an impressive rate in his Beemer (that car is a weapon!) . One of the car salesmen said that his girlfriends RSI would do !35 mph so in actual fact I was quite dissapointed that I was short of this (even though I didnt believe him anyway). My old Nova with 60 odd bhp would wind up to !12 on a straight (the emphasis is on the word wind).
Im also suprised that some of the 172 owners have difficulty attaining top book speed as whilst in a mates astra one (MK1) kept along side us at over !40. Truth is these are scary speeds, Im sure every one here can relate to mad moments in their cars and its not something that I like to do very often or am proud of for that matter, especially having recently been witness to a nasty accident (a very sobering experience considering the modest amount of speed invlolved) I havent modified the car because I cant afford it right now especially after having bought the car outright. Id be interested to hear if you do find a problem with your car although the 17s probably have a lot to do with it!
Stu