Quote:
Originally Posted by maswastage
I noticed the article also misidentifies the 535d's engine: unless I've missed some new development, BMW's N57 is their latest diesel, but it is a single turbo used in the 330d and developing 245hp. The more powerful sequential turbo engines are designated M57 and they're actually not as new as the N57s. Given the 535d uses the sequential turbo setup, I think it's actually running a variant of the M57.
It's interesting how there's the same sort of "N55 vs N54" relationship between the two engines: the N57 is technically newer and more advanced, but the M57 seems to be the choice for BMW's more powerful models.
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I'm kinda puzzled, I thought the N57 was offered in two variations, the 30d and 40d (x5 as an example) I thought the 40d was a single turbo with twin scroll technology. I looked at the specs listed at BMW.CO.UK and sure enough it lists the 535d as a twin turbo, same with the x5 40d. 30d is listed as a turbo. The funny this the 30d and 40d are rated at the exact same mpg.
From my understanding the N57 is more fuel efficient that the M57. So if the 535d is a M57 how could it get the same MPG as the 530d N57? Very strange. Hopefully a knowledgeable Euro member can shed some more light on this.
I'm holding out for one of these engines in a X3 for the USA,