Scirocco Central

I currently own the 140 Tdi engine and I'm just wondering what's the difference between mine and the 170 model. Are all the parts the same on the car? I'm guessing they probably are and the only difference is how the engine is programmed.

Thanks!

This has been discussed many times. The engines have different turbo, cams and injectors. In addition the 170 has larger brakes.