Hi there i pick my new car up this week A4 35 diesel and looking at getting it remapped,Ive currently got a A5 sportback 190bhp and be dropping down to 150bhp in the new car.Ive spoke to garage about doing the remap who is very repritable (Star performamce fife) and they told me i would be looking at gaining about 90bhp which seems high from a remap. 

Has anyone had theres done and if so what sort of power did you gain and is there any repercussions? 

 Not sure about power tollerences in the car so thought i would ask before pottentially doing some thing stupid,thanks

Is it a remap on a rolling road? 

Have a look at Celtic tuning website as they show you what gains you can get from their maps which you could use for reference