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      06-01-2014, 06:27 AM   #16
mkoesel
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Drives: No BMW for now
Join Date: Jun 2006
Location: Canton, MI

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Quote:
Originally Posted by Eau Rouge View Post
seriously?

Higher rpm = increased fuel consumption.
Generally, but keep in mind:

- Redline for the S55 is only 300 RPM lower than the S54

- EPA testing probably does not even take the engines near redline, or if it does it would be only very briefly.

- The S55 makes about 100 more horsepower than the S54.

It seems like a reasonable trade-off.
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