Quote:
Originally Posted by maswastage
Personally, I've always been skeptical about the difference in power between the US and EU 335d's. The only difference is the urea exhaust injection, which isn't the sort of thing that should cost any horsepower. From the dynos I've seen they're all making right around 300 at the crank.
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I think the cetane rating of the fuel could matter. Lower cetane fuel doesn't burn as quickly which could affect the amount of power you get at higher RPM's. Since the US only requires 40 cetane as a minimum, maybe the HP ratings take that into account?
I don't know if there's any measurable performance difference when running 40 cetane vs. 51 cetane. Fun science experiment for somebody.
BTW if you bought a BMW diesel last year in the US, don't forget to claim your tax credit when you file!