BMW 320i and 330i what are the differences?

I talk about the differences between the BMW 320i and 330i petrol models with b48 two-liter engines. The video shows the differences between the bmw 320i and 330i in both of the f30 and g20 bodies.
I also talk about my thoughts of the BMW chiptuning.
All conclusions made in the video are the personal opinion of the author and do not claim to be the ultimate truth.
The video was created for educational reasons and does not call anyone to any action.
The numbers obtained in the calculation results are rounded to 2 digits. The Pi is taken as 3.14, and the engine displacement is 2000 cm3 (real displacement is 1998 cm3).
Additional materials used to create the video:
Information about b48 at the time of the appearance https://www.bmw.ru/ru/all-models/3-se...
Original in German with a description of differences in engine parts https://www.bmw-syndikat.de/bmwsyndik...
Russian translation from German https://www.drive2.ru/b/4840336069230...
Instructions for the BMW dealers about the chiptunning https://tis.bmwcats.com/doc1038457/
Brochure for the client about the chiptunning https://tis.bmwcats.com/doc1038458/
Pistons and engine testing (in English) https://cdm.ing.unimo.it/files/proget...

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