Thanks to all those who answered my question. The reason I asked is because I'm looking at a Fiesta ST as I'm a bit bored of my current car, as I just don't think it has the fun factor for me.
I currently have a 1.9TDI Audi A3. Now I know me wanting to go from an A3 to a Fiesta ST may surprise some people, but my main issues with the car is that it only has 105bhp, doesn't have a trip computer or cruise control etc, is 5 door rather than 3 door (only me who drives it), and size wise it's a lot bigger than what I've driven in the past. I will learn in future to do more research and to have more than one test drive.
All my previous cars have been petrol, only went diesel as I now drive about 30 mile a day getting to and from work (no motorway driving though) so thought I'd go down the economical route of driving, but I don't think it's for me. The A3 feels more suited to someone who drives longer distances on a daily basis.
I have considered going down the S-Line route, but the ones local to me are either too expensive, wrong colour, or too old. However if I did go down the Fiesta ST route, I would take quite a hit financially when it came to part ex going of the prices of both cars.