Golf 4 ARL vs. Seat TDI Cupra: Differences

Hello.

I'm interested in the hardware differences between these two engines. As far as I know, the 150 hp TDI has the ARL engine code, and the 160 hp TDI has the BPX engine code.

Now, these should be two different engines. Or is the BPX just an ARL with modified software but the same hardware?

I'm really very interested.

Sure, here is the translation of the text from German to English:

"MFG" is an abbreviation for "Mit freundlichen Grüßen," which means "Sincerely" or "Best regards" in English.

Hi,

The differences that I am aware of are:
-> Turbocharger (part number and nozzle position, where both likely have GT1749VB ).
-> LLK (no translation needed, assuming it's an abbreviation)
-> Software
...and of course, the vehicle-specific peripherals such as exhaust systems, fresh air intakes, etc.

According to the documentation, the engine blocks are completely identical.