Thanks All,
With the acoustic guarding (three of the brackets snapped and all the nuts and covers missing. Called the mechanic that took off the cover; he doesn't have them!!!) replaced, it actually sounds fine now. I'll have to check the bearings on the ancillaries that you mentioned Timm. I'm du to do the belts anyway. They're looking a bit ropy so I can check stuff out when I get to that. I have now also a pretty smooth idle. Taking the oil cap off when the car is running TerryY does change the running, but when put back on it seems pretty smooth. Problem I have is I have no point of reference as don't know anyone else with an 8, and have never been in or listened to another one.
Problem I have now is that I still have an oil leak!!! Discovered a couple of drops under the car after a night, and that's after just driving it around the block!!! Also, getting a bit of smoke coming from the rear/passenger side (LHD) (see movie) of the engine. I ran a clean rag around the valve head gaskets and checked the dowty seals, no oil. I've put some paper under the car and will check again tomorrow to try and pin-point where it's coming from. This is getting a bit frustrating!!!
Ivan