I have recently bought my orion and it is so slow. I had a 105ps version and that was faster! I thought it might of had a 105 lump put it but I can feel the power low down, and having already had a 105 I wouldn't say the engines been swapped. The car has been chipped, induction, boost valve, de-cat and full system exhaust 2" bore - somewhere in the region of 150bhp. Sometimes it will shift and sometimes lags but never really moves like it should. Once it gets to 4000rpm it seems to stop speeding up and just farts about.
If I put my foot down or try a fast start it feels like somethings slipping. It feels like i'm getting wheel spin but the wheels are hardly turning and the front end moves all over the road. I thought it might be clutch slip? I've had a clutch slip before and it was nothing like this though.
I'm wondering whether it could be the gearbox? It has a lifter to put it in reverse, like on the xr4x4's etc. Like I said I had a 105 and this didn't have one, I thought the boxes from these two would be pretty similar.

I'm pretty puzzled so any help or advice would be great. Cheers