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2019+ BMW 3 AND 4-SERIES FORUMS (G2x Generation) General G20 Sedan / G22 Coupe / G26 Gran Coupe Discussions Do the 320i and 330i have the same engine?

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      06-15-2019, 02:26 PM   #1
imagineranger
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Question Do the 320i and 330i have the same engine?

I noticed that G20 320i and 330i both have B48B20B engine equipped. Does that mean their engines have totally the same parts and just tuned for different powers?
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      06-16-2019, 07:49 PM   #2
dreme
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yes, everything suggests that it is the same engine
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      06-16-2019, 11:33 PM   #3
sspdw
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Im pretty sure its differences, pistons for a example.
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      06-17-2019, 02:29 PM   #4
imagineranger
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Quote:
Originally Posted by sspdw View Post
Im pretty sure its differences, pistons for a example.
but parts catalog indicates their pistons are same, as well as other parts which are exclusive to the engine marked as B48D.
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      06-17-2019, 03:30 PM   #5
sspdw
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Quote:
Originally Posted by imagineranger View Post
but parts catalog indicates their pistons are same, as well as other parts which are exclusive to the engine marked as B48D.
I could be wrong but im pretty sure 20i has higher compression ratio 11:1 vs 10.2:1
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      06-24-2019, 12:32 PM   #6
SteveinArizona
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Same engine, different tuning and some different parts.
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      06-24-2019, 01:14 PM   #7
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Quote:
Originally Posted by imagineranger View Post
but parts catalog indicates their pistons are same, as well as other parts which are exclusive to the engine marked as B48D.
For spare part efficiency, BMW keeps the top-line replacements parts on the shelves even for the low-end engines, but those engines are made out of lesser quality materials at the factory.

Also, I guess some of the auxiliary parts like the turbo are (vastly) different.
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      06-24-2019, 04:00 PM   #8
Calamari
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Quote:
Originally Posted by mbanck View Post
For spare part efficiency, BMW keeps the top-line replacements parts on the shelves even for the low-end engines, but those engines are made out of lesser quality materials at the factory.

Also, I guess some of the auxiliary parts like the turbo are (vastly) different.
Correct. The same approach is used on the 2,0 diesel engine range (16d, 18d, 20d, 25d).
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      06-25-2019, 09:48 AM   #9
sspdw
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Im seeing different sources saying 11:1 on 20i and 10,2:1 on 30i. But realoem showing the same pistons. The m135 2.0l b48 has 9,6:1.
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