This Audi A4 is the later style 2.0 commonrail turbo diesel with 177 bhp as standard and a claimed 380 nm. As we see a lot with modern diesels, this car produced over the claimed torque figure making 410 nm as standard, with still plenty of room for improvement.
The graph below shows the difference our CustomPro remap made. You can see the torque improvement is massive making more torque earlier in the rev range but also holding it for much longer. Peak power when standard was made at 4,200 rpm, now after the remap you see the same benefit at 2,900 rpm (a usable rpm range in a diesel car).
Power gained: 31 bhp
Torque gained: 74 nm