Hi Guys 'n Gals,
Just a build on the comment about 207 Gti engines suffering from a similar problem.
I currently have a 207 Gti and have just been through the anti-pollution system fault/lack of power issue.
On my car, first the timing chain tensioner was changed for a modified version, then the variable valve timing sprocket on one of the cam shafts was replaced.
It has been fine ever since and can return 45mpg+ on a steady motorway run from London to Birmingham.
I have an acquaintence who also has a 207 Gti. He has had similar problems but believes he has also had an ECU software upgrade.
I know I haven't because I have facilities to interrogate the ECU in my car and it reports the same software version as it did before the rectification was done.
From what I can see, it looks like there was some form of design flaw that affected one or more engine types for a period of time.
I would advise anyone who has these sort of problems to do a quick internet search using tems like 'anti-pollution fault', 'thp', '207 gti' & 'mini'.
This should bring up a few blog/forum posts from other owners with similar problems.
Armed with this info., a polite conversation with your Dealer or warranty provider should get it fixed. It's an known issue but they like to down-play the significance.
Get it fixed before your warranty expires.