M50 And M52 Engines

[oe_tuning]

Hi everybody...

I'm new here, so really sorry if this question was already asked before.

as the title said, what is the difference between M50 and m52 engines?

I want to buy a used 95 e36, and wondering if the price difference is worthed

thx !!!

[SHAHAB323IS]

i just got a 98 323is, it has an m52b25, the difference between the two

the m50b25 has more hp than the m52b25, 189 vs 168, the m50b25 has different compression than the m52b25, 10.0:1 vs 10.5:1, the bore and stroke are the same, the torque is the same, the displacement is the same 2.5l, 2494 cc, anything else you want to know, oh and also the m52b25 is obd11, and the m50b25 is obd1, there is also an m52b28 that has 190 hp, that is what was used in the 328's, ok now is there anything else you want to know, lol

[xsperf]

hes not talking about b25, hes talking about just plain old m50 and m52..
this is e36
i believe one is a 2.5L(325)
and the other is a 2.8L(328)

[SHAHAB323IS]

the m52B25 <--full name of engine for clarification as to not confuse the 2.8l engine with the 2.5l engine,

m52b25---2.5l

m52b28---2.8l



and also he said a 95, the only m50 was the m50b25 the 2.5l engine, so what are you talking about when you say he's not talking about b25?????

[xsperf]

what im saying is, you have too much detail, but, ur last post is just fine.. i actually learned something today

[SHAHAB323IS]

Originally posted by xsperf@Nov 28 2004, 01:55 PM
what im saying is, you have too much detail, but, ur last post is just fine.. i actually learned something today

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ok i was just trying to make sure that there was no confusion that's all

[robbins6103]

I believe the M50 engine has an OBDI and the M52 has an OBDII as well.

-DR

[bigred318]

that is what i understand also...

David

[jllphan]

The M52B28 is probably the one in question, and it is indeed a 2.8L engine. The M50 is undoubtedly the 2.5L used in the 92-95 e36 cars equiped with a 6 cylinder powerplant. While you only gain a couple of hp with the M52, there is a massive difference in torque available througout the powerband (thanks to VANOS).

There is no doubt that the M52 is vastly superior (0-60, feeling of power, acceleration at almost any speed, etc.), and certainly worth the money. The M50 is however equipped with the OBDI engine management system, which means there is much more available in the aftermarket world. Of course you could always do what I have, and that is an M52 engine mated to an OBDI induction system.

[SHAHAB323IS]

Originally posted by robbins6103@Nov 28 2004, 04:11 PM
I believe the M50 engine has an OBDI and the M52 has an OBDII as well.

-DR

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"oh and also the m52b25 is obd11, and the m50b25 is obd1"

i wish the guy would come back and tell us which m52 he's talking about

[bavarianmotorsurgeon]

dont the 1993-1995 325's have vanos? maybe i just misread and am confused. Are these not also OBD1? This is what i was told. Whats the horse power rating on those ones by the way?

[illwasteyou]

i dont get any of this...
how do i see which engine i have?

[oe_tuning]

thx guys for all the explanation

actually i'm looking into e36 320i.
in my country, year 94 have M50 and year 95 have M52.
but both are 2.0L 6-cyl generating about 150 hp.

all i know is that M50 use steel cyl head and M52 use aluminium cyl head which is lighter...
is it true M50 doesn't have VANOS?

thx again

[jllphan]

Yes, most of the M50 engines are equiped with VANOS. As far as I can gather, the M50 created for the 5series got VANOS in 1992, it came one year later to the three series.

[SHAHAB323IS]

Originally posted by illwasteyou@Nov 29 2004, 03:26 AM
i dont get any of this...
how do i see which engine i have?

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what kinda of car do you have?, i'll tell you