dont do it! they sound rubbish and your be changing gear every 2000 revs, plus they will make the back end of your car all sooty, plus when you remap it you will have to buy a new clutch which isn't cheap. I spend £140 a month on fuel (well thats before they put the price up!) and wouldn't change it
Funny, your quite definate in your denouncing of the TDI, but have you owned both cars??
Having owned both they are both great cars, and not far offeach other on perfomance. When i was doing silly miles the TDi was great and so cheap. The only reason i ever changed back to petrol was cos i wanted a Mini as they're on another level compared the beeza and also i do roughly 10k a year now due to using train for work.
But eveni have vowed the next car i have will be a tdi golf 4motion as i will be at an age where i need to go sensible, also fuel economy will be a real need soon if these petrol prices continue to go sky high, especially as i can only run on 99Ron in the Mini now.
I did the change to Tdi and never regretted it, still a good car and the bit about clutch and low revs in blollox, never changed my clutch or had problems until the day i sold it, which was my bad driving....lol