Im not having any problems with my 320i E92 yet (4200km done), and to be honest I dont think 116i is comparable to 320i in case of acceleration. 116i accelerate over 2sec slower to 100km/h, so this is noticable difference. Maybe its something wrong with ur car Alpini.
Did u guys make some engine problems summary data sheet which u could share? Im curios whats wrong with those engines and what are the symptoms.