Hmm, Jonzy mentions Chav's, and Dave posts to an ebay link of his clio! Coincidence?? LOL
Hmm could be up for a few beers, in the big lights! Newports gone down hill recently, too many bridges these days.
As for the comparison between the cars, they'd need to all be run on one car, with the same air temps, same engine temps, same air density, to be able to compare them fully, which unless seat give us, 4 identical cars, which are rolling roaded to prove the same standard bhp, and then they are all run on the rollers at the same time, then that would be the only accurate result. Granted, the air temps wont change much, but if it has changed , then it wont be a fair comparison!
ie. all variables must be the same.