I guess it depends on what you're looking for as 'peak' torque
anything above 250Nm means 2,000 revs until red line
above 300Nm is 2,150 to 4,000
and above 350 is 2,250 to 3,500
realistically, the engine 'picks up and runs!' from about 2K revs and feels like you need to change up at about 3,500 to 4,000 - which thens dumps you back in the 'zone' in the next gear
To a Petrol driver, this
sounds like a very small rev range - but when you consider than the red line on the petrol is roughly twice that on the diesel it begins to make more sense.
If we double the numbers above, to get a feel for where they would be in the petrol:
anything above 250Nm means 4,000 revs until red line
above 300Nm is 4,250 to 8,000
and above 350 is 4,500 to 7,000
which sounds a lot better