Quote:
Originally Posted by Tom K.
Ever since BMW dropped the 2.5l 6 (called the 323i at one point) in the U.S., there have been two basic tunes for the N52. The higher tune (225hp in 2003, 255hp currently) was marketed as the 330i, 530i or Z4 3.0 (now the Z4 3.0si) and the lower tune was in the 325i or Z4 2.5 (now the Z4 3.0i). To further add to the confusion, the lower tune currently has two variants - 230 hp/200 ft lb in the 328i & 128i and 215 hp/185/ft lb in the Z3 3.0.
All of these motors are 3.0 liters. And no one has answered the question of why the U.S. can't have a 130i, which is a one series N52 with around 255~260 hp and 225 ft lbs of torque - as is found in other parts of the world. Especially for those of us who don't particularly care for turbos...
Tom
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Actually, in the US the N52s came out in 2006 and BMW used the 2.5 liter motors up to 2006 in the 3 series coupe and convertible, and x3.
the previous 325/525/z4/x3 2.5 all had a 2.5 liter motor, (these were the M54 models..185hp).
Up to 2005 (2006 in the 3 series coupe, and x3) the -30 and 3.0i models were a 225hp m54 also. Driving an 05 z4 3.0 vs 06 3.0 back to back was a noticeable difference with the older M54 motor being much stouter.
In 06, the N52s came out in the 325/525 as a 3.0l lower output 215hp, the z4 3.0i too.
the 530, 330, and 3.0si z4 were 255hp, the x3/x5 260hp outputs.
Then they added the 128, 328, 528 moniker for a middle of the road version (output wise) at 225 as they went to the top level turbos in the -35s.
I don't portend to know the specs of the n52 in detail, why 1 is stronger than the other....there is some pretty good explanations here...
Moral of the story..the m54 2.5 liter was around till 06 here in the USA...
I know, i owned a 325ci 2004 for a short while...
Joe