Quote:
Originally Posted by Davo2003
I know that the 2006 325i was a detuned version of the 255hp 330i engine. I suspect the 328i engine is also the same they just bumped the horsepower through better intake/exhaust or software etc. to remain competitive. The 3.0 Z4 has to be the 255hp 330i engine. 2006 330i was the debut of that engine which doesn't make it so "old". Isn't that the same exact engine as a carryover from the previous gen Z4 anyway??
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Actually after researching a bit further I didnt realize that in 2006 the Z4 switched over to the N52, and held the same engines in 07, in 215hp (325) and 255 (330) variants. Before 06 the Z4 carried the same engines as the E46, the M54's.
So basically it just looks like the are dropping the 215hp variant and keeping the 255 hp version as now the base car.
You are correct the E9X 325/328/330 all have the same engine except the 330 has a 3 stage intake the other 2 do not. And the software is different, there maybe some other slight difference as well but they are basically all the same. They are all N52 engines.