You could get a petrol turbo to give those figures and even better with the correct upgrade/tune.
O/S there's a VXR high torque upgrade, which gives a total of 467nm and developes 400nm from around 2500-3000rpm.
The same tune also gives you 228kw !
The oiler's no match, but on the flip side, it will give you much better range and lower fuel running costs
I believe there's also a local diesel tune, for the AH which developes 147kw and 420nm.