I have had 30mph in ist gear (although it is on a "small slope" lol) and 60mph in second gear just before hitting the limter on a straight.. and mines standard with only around 5k miles.
The 1.6 16v Clio's aren't surposed to be "Sports Cars" and as such aren't really up to the job lol. The only reason I got mine was because from passing my test it was the only car for me (although I did want a 172/182 like most people, but there was a small thing called insurance lol) at that time.
Its not that bad really as I was having a mess about with my mate in his 1.8 16v Vectra on an X reg and I was pulling away abit. Although that was proably because the Clio is lighter than the Vectra.
I mean has DINK got any more weight? i.e. subs, how much fuel was in the car etc.. I don't have anything in the boot.