I need to clarify the issue I think.
I'm not complaining about the

in general, in fact it's an excellent package.

I have diven ST_ONE's so I know how it should be.
When I say the performance is poor, I mean in relation to other

s not to other cars.
There is severe throttle response (flat spots) in fact the whole rev range is a flat spot, it's as if the engine timing is out or the car is not getting enough fuel (or too much at the wrong time as aveage fuel conpsumpsion is 25MPG.)
For the first 600-800 miles from new the car was a little rocket. Then the lumpy idling issue appeared and since then the car has gradually got worse.
E.G. - You know when you come to a T junction and your turning left and the road is clear so you don't have to stop? Well you normally can leave the car in 2nd and just pull away nicely. Not mine, I have to stop and engage 1st or else the car will just sit there sucking air.

If I want to over take someone at say 30MPH, I have to drop to 2nd and scream the knackers off it or it will just sit there sucking air in 3rd or 4th.
I was running on Optimax from new then BP Ultimate but have now changed back to regular 95RON as I'm not getting any benefit.
The handling is superb yes (albeit a bit on the hard side at the front.)
The car is going into the dealers again tomorrow as a field technician is coming from Dunton to test the car. Apparantly he only deals with

and

models, so he SHOULD

know his stuff.
I will keep you posted.
I shall be telling him that I will only accept that the car is as it should be if he gives me a dyno print out showing that the car has indeed got 148BHP and 190NM of torque.
If it has then it's time to sell or do a bit of upgrade work I think, Air Filter/Flexi and a Magnex.