If that graph is to be trusted - it is certainly a bit disappointing.
Wonder how it would compare to a 535d with tuning box?
Last: 330cd Sport - Silver Grey, 335d M Sport Coupe, F10 535d M Sport.
Current: AW F21 M135i, Coral Red, Pro Nav, Vis, HK, & Clunky Adaptive Suspension
Current: X5 XDrive 35d M Sport - Black Sapphire, lots of toys.