Following on from what somebody said about cars being way overpowered I decided to do a little bit of post-race 'testing' with a few of the other cars.
I managed to get the RX7, the Astra and the TT all into the 1:55's comfortably.
It took me 3 test sessions to put my RX7 in 55 !
To be honest, I finally understood yesterday evening what was wrong in my tune and that made me move from 57 to 55.
I will put the RX7 tune in my garage. I made some final modifications after the "race".
For this car selection, I guess that the CLK DTM can also be in 55. It is generally as fast as the Astra.