i have had an 135i sold it after 3 months fed up with the turbo lag en limp mode on track.
I now have an M3 E90 fantastic machine. Throttle respons just awesome never saw that in a turbo engine.
Bring on M 4 cil turbo with 300hp no problem but
throttle response like atmo ///M
Can drive all day on track without limp mode and heating problems.
No turbo failures
No turbo lag.
If they can manage that in a one series ///M hatch or coupe with a weight of 1200kg. I am going for a test drive.