This is how you can tell whether your N20 20i/28i engine is 10:1 or 11:1 compression

Slow_poke_driver

Well-Known Member
May have already been discussed before...

This is how you can check if your n20 engine is 10:1 or 11:1 compression ratio. i.e. this will end the debate of what engine is in what car.

Generally, 320i/520i should have 11:1. x1 z4 x3 should have 10:1 whether yours is 184ps or 245ps engine.

BUT HOW CAN YOU CONFIRM WHAT YOU HAVE?

Just go LTA website:
https://vrl.lta.gov.sg/lta/vrl/action/pubfunc?ID=EnquireTransferFee
Type in your number plate and key in any date. Don't worry, your car will not be transferred to anyone.

Then from there, check your engine code:
View attachment 56335
__________________________________
View attachment 56336

If you see N20B20A= 10:1 compression ratio. Here it is the 528i.
If you see N20B20B= 11:1 compression ratio. Here it is the 520i.

If you see N20B20C or N20B20D, you may have an engine that is made in china. Nonetheless, C is 10:1, D is 11:1.
 
Re: This is how you can tell whether your N20 20i/28i engine is 10:1 or 11:1 compress

My x1 20i is N20B20A. So yes, 10:1 compression then.

Interesting...
 
Re: This is how you can tell whether your N20 20i/28i engine is 10:1 or 11:1 compress

Meek;1045189 said:
My x1 20i is N20B20A. So yes, 10:1 compression then.

Interesting...
n20B20A shld be 28i right?
 
Re: This is how you can tell whether your N20 20i/28i engine is 10:1 or 11:1 compress

Terras14;1048561 said:
n20B20A shld be 28i right?

You shud read the above again....
 
Re: This is how you can tell whether your N20 20i/28i engine is 10:1 or 11:1 compress

Interesting. X1 having lower compression. Higher boost?

Usually that's the case. So Meek got bigger turbo. Can chip up like siao.
 
Re: This is how you can tell whether your N20 20i/28i engine is 10:1 or 11:1 compress

Meek's turbo already chipped up. If i see her on the road I will give way immediately.....
 
Re: This is how you can tell whether your N20 20i/28i engine is 10:1 or 11:1 compress

C3P0;1048596 said:
Meek's turbo already chipped up. If i see her on the road I will give way immediately.....

You so clever ne.... shhhh.... i forgot to tell you its potato chipped! Heeeee....
 
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