ruff wrote Thanks south,
BMW continues to throw the bogus efficient dynamics slogan out and tried to make a case for 8% increase in efficiency over the E46 which is simply false, no matter how many ways BMW tries to cook the books. The M3 gets poor mileage especially when compared to similarly performing Porsches and the ISF. I am hoping that BMW realized they missed the boat like many manufactures about the escalating oil prices and it's impact on the economy and are revising the 4 litre to implement DFI. If Porsche can do it, BMW can do it better. As great as the 4 litre is, it will struggle to survive in $5+ a gallon U.S. economy. IMO, the M3's biggest weakness by far is it's lack of fuel economy, thanks to the economy.
Imagine a M3 shedding maybe a hundred and fifty pounds with a 10-15% or so percent increase in horsepower and fuel economy. I would gladly give up the Lexus like options and pay whatever extra BMW felt obliged to charge.
I disagree.
Clearly BMW does its good share of marketing spin and I have been critical of them here as well. I too am a bit disappointed about the quoted efficiency vs. actual mpg and the M3s weight as well but let's look at why efficient dynamics is real.
-I think the engine is 8% more efficient. That is an accomplishment.
-Dynos and performance results show the M3 as a slight over-performer some of this I believe to be from minimizing drivetrain losses
-BER (although very unfortunately not present in NA) is a nice part of ED
-Although not lighter than the previous generation there was much more effort put into weight management on the car than on past cars (roof, fenders, hollow suspension, drive and engine components), more aluminum, heck light weight carpet, etc. Is careful management and offsetting of weight gain ED? I think it is... sort of...
We've had this discussion before and efficiency is important to me, but it really is a bit silly to make green or efficiency criteria near the top of your list for a car like the M3. As well I honestly do not believe that $5/gal gas would significantly affect the success of the M3. I already pay over $4.60 depending on which station I stop at. High gas prices are sort of a regressive "tax" on the poorest folks in our society.
On your last point - sure that would be a truly amazing car. You do realize that it would very likely cost $100k+ right? Engineering is very often about very clever management of conflicting goals. The M3 wins big time here.
OP: Sorry for the OT but the discussion is good.