Don't say that lol are they that bad don't get me wrong car drives spot on but how can it be standard 215hp ? Standard from 200 lol
AMD rollers have proven time and time again to be generous with the readings. Standard K03 GTIs on well known accurate rollers rarely have more than 200bhp, 215bhp would suggest some modifications before hand.
People have had fantastic figures at AMD, only to find on another set of rollers that they only have the same as everyone else at stage 1
Try Surrey Rolling Road, or JKM in Portsmouth. I'd put money on it that you get lower readings
Realistically you have around 242bhp I'd estimate