I've had smaller displacement turbo 4s and they do have to be in their band or they are dead as a doornail, aside from the 4cyl VAG TDI which has so much torque that they are good at 1krpm to 3-4krpm so will laze about then you can floor it and get a donkey kick in the seat. Even had a petrol 2.3 turbo and it laboured at low revs. It's a shame. My VR6 and my focus ST I had before are/were just brilliant, They both laze about at idle pulling the car along and would still deliver the goods, flexible, the ST turbo 5pot (at least the tune I ran on it - 300hp) is the best engine I've ever had in a