why did you chosse 128i vs 135i???

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Per BMW, 6spd 128i is 3208lbs with a 50.5/49.5 % weight distribution
And a 6spd 135i is 3373lbs distributed 51.6/48.4%

5.2% weight difference, shifted 1.1% further forward. Yes it's different, but is it really a leading reason to choose one car over the other? Perhaps it is. Perhaps it's not nearly as much as some people think.

[BrokenVert]

Originally Posted by TheSt|G

That's the engine, but not counting the turbo plumbing/turbos. Seeing as the N54 wouldn't make its power without, it is a bit disingenuous to the discussion.

Do you have real numbers on the TD-3's weight or are you guessing? Because without real numbers, I cant take you seriously.


Also, lets be genuine. The N54 is factory tuned to make 330ish bhp. The S54 in its most powerful street application was 340ish hp. Thats a wash in terms of power and it makes no difference.


So for all intents and purposes they make the same power.



I also recall Scott saying that BMW toyed with the idea of putting an S54 in the 1M, but decided that the S54 was too heavy for the car, and disrupted the weight distribution, in turn messing with handling.

[Daft Auto]

The N52 actually weights 148 kg* = 326 lb,

If the N54 weights complete at 195 kg = 430 lb,

That's close to a 100 lb difference over the front axel alone - are we really being that naive about that?
That's a lot of weight taken off a pivotal point in the car.
I could never imagine opening my engine bay, and squeezing the weight of half a full sized adult in there.


*I'll source Ward's over your wikipedia entries any day:
"The all-aluminum N20 I-4 is about 22 lbs. (10 kg) lighter than the N52. Overall, the engine weighs 304 lbs." (138 kg).

[TheSt|G]

Originally Posted by BrokenVert

Do you have real numbers on the TD-3's weight or are you guessing? Because without real numbers, I cant take you seriously.

Not guessing, seen it around before.

Originally Posted by BrokenVert

Also, lets be genuine. The N54 is factory tuned to make 330ish bhp. The S54 in its most powerful street application was 340ish hp. Thats a wash in terms of power and it makes no difference.

So for all intents and purposes they make the same power.

Highest spec listed N54 power is 300hp. Highest spec listed S54 power is 355-360hp. 355 is often times greater than 300.

Originally Posted by BrokenVert

I also recall Scott saying that BMW toyed with the idea of putting an S54 in the 1M, but decided that the S54 was too heavy for the car, and disrupted the weight distribution, in turn messing with handling.

S54 was tabled because it no longer meets emissions. There was a decent sourced Bimmer Mag article on it. I definitely would have snagged one if it had been the case.

Or they could have used the S65, but then there would be no reason to buy the E92 M3.

Originally Posted by Daft Auto

The N52 actually weights 148 kg = 326 lb,

If the N54 weights complete at 195 kg = 430 lb,

That's close to a 100 lb difference over the front axel alone - are we really being that naive about it? That's a lot of weight taken off a pivotal point in the car.

I could never imagine opening my engine bay, and squeezing the weight of half a full sized adult in there.

Spot on.