Question on Carbed M110 2.8 - PeachParts Mercedes-Benz Forum

chinny4290 · #1 07-14-2009, 03:36 AM

Hey. Does anyone know what the compression ratio is on my 1975 280S? It has the carbed M110 I6 2.8.

thanks yall!

Takernz_30 · #2 07-14-2009, 05:37 AM

Quote:

Originally Posted by chinny4290

Hey. Does anyone know what the compression ratio is on my 1975 280S? It has the carbed M110 I6 2.8.

thanks yall!

I have 1978 280S too but it's a European version, according to my M110 service manual,it says M110 Euro is 9.0:1 rated at 160 HP, USA models had 8.0:1 rated at 120 HP b/c of emissions.

chinny4290 · #3 07-15-2009, 01:04 AM

Quote:

Originally Posted by Takernz_30

I have 1978 280S too but it's a European version, according to my M110 service manual,it says M110 Euro is 9.0:1 rated at 160 HP, USA models had 8.0:1 rated at 120 HP b/c of emissions.

According to W116.org the CR wasn't lowered until Jan of 1976 and mine is a 1975 so I'm hoping that mine is 9.0:1

Takernz_30 · #4 07-15-2009, 06:24 AM

Quote:

Originally Posted by chinny4290

According to W116.org the CR wasn't lowered until Jan of 1976 and mine is a 1975 so I'm hoping that mine is 9.0:1

to confirm, rotate engine to TDC (0/0 mark),take out 1 spark plug at #1 cylinder then take a flash light and peek inside. Euro models have little lump (I don't know what's that for) on the piston top while the USA had flat piston top.

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