Peteb1951

Thanks for the replies.
Ref requested info. The shock was replaced by my Audi main dealer with an OE item. The tyres are Michelin Primacy,  ranging from 4-6 mm of tread and no uneven wear pattern.  My driving style can be very enthusiastic at times.
I've switched from comfort to dynamic mode. Changed the pressures from the comfort setting of  33f,30r to  the standard 38f, 35r. It did give an improvement.
Today visited my Audi dealer, Swansway Garage at Crewe. They were very good and with no notice arranged for a technician to go out with me and he drove the car. His opinion is it that didn't feel any different to others of the same model he drives on a regular basis. Everything was OK in his opinion. He asked me what my previous car was? A Passat high line 2.0tdi 190. He went on to say that he'd  worked for  most of the VAG marques and that the Passat was a "drivers car" but in his honest opinion my 2020 A4 b9.5 TDI 35 is not. It's a comfy small exec milemuncher. 
He's right of course, I was taking the A4 out of its comfort zone and was expecting too much. (My Passat had 235/40 low profiles, virtually nobody roll and could corner as though on rails)  I expected  the same, but the A4 is adequate until pushed hard. If I wanted one  to chuck around he recommends the S4. I still love the car, just a case of driving it within it's limits (I bought the car in January and on the test drive we had cold frosty conditions so I never pushed it too hard)
NB my shortlist prior to purchase consisted of the Jaguar XE, Mercedes C220d, BMW 320d series and another Passat.