Its 160 in standard then 200 with the Sport button on. I used to have the Standard 150 Astra which wasnt bad for a 19 year old then I saw the light come 22 and got an Edition 30
It is the Fiat or Alfa engine as they like to market it. Know loads of people that have had the turbos blow up due to the power theyre pushing through it with the 'tuning boxes'.
ABYSS on VAGOC is the owner of AON (Astra Owners Network) and he peddles loads of the DTUK (Diesel Tuning UK - His company) boxes through that site. I had one at one point and it was impressive but I cant imagine it being too good for the engine...I wont go into it too much as everyone has their own opinion on them.
If I remember correctly, you remove the sensor on the common rail and then connect it via the 'tuning box' so effectively it over fuels the engine without changing timing and boost.