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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > N20, N26, B46, B48 Turbo Engine / Drivetrain / Exhaust Modifications > N26 Cyl Compression numbers
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      10-06-2022, 07:55 PM   #1
socalr53
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N26 Cyl Compression numbers

Hi All - I am in the market for a used N26 engine. I see some sellers post cyl compression numbers. I know it should be somewhat same for all cylinders, but, what should be a decent compression value for the N26 engine ?
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      10-10-2022, 05:15 AM   #2
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20i was 11:1
28i was 10:1
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      10-10-2022, 06:23 PM   #3
socalr53
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Originally Posted by MaverickCruise View Post
20i was 11:1
28i was 10:1
hi, thanks for the reply, but I was looking for the cylinder compression number for each cylinder. I think what you said is the compression ratio of the N20 and N26 engine
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      10-11-2022, 09:16 AM   #4
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Quote:
Originally Posted by socalr53 View Post
hi, thanks for the reply, but I was looking for the cylinder compression number for each cylinder. I think what you said is the compression ratio of the N20 and N26 engine
The cylinder block is the same, but the difference is the piston compression ratio
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      10-13-2022, 12:48 PM   #5
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I want to say in the 190-200psi range, but I don't remember. Probably depends if the motor is warmed up and the oil film on the cylinder walls.
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      10-14-2022, 11:43 AM   #6
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I want to say in the 190-200psi range, but I don't remember. Probably depends if the motor is warmed up and the oil film on the cylinder walls.
Pressure in cylinder ?140-170
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