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Old 06-28-2012, 02:45 PM
Robert A Robert A is offline
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Location: Los Angeles
Join Date: May 2003
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Mein Auto: BMW 535d
How do you quantify the fuel economy bump with the 4 cylinder? The 528i when from 22 to 23 city mpg when the 240 hp 6 cyl. motor was replaced with the new turbo 4. To me, that's no improvement.

Originally Posted by voip-ninja View Post
I think you're probably mistaken. Small turbo engines are incredibly common in Europe (everyone has gone to them, even Ford) and they are still quite reliable.

No question that the normally aspirated engine sounds better and is smoother, but it gets worse fuel economy and actually quite a bit less powerful than the new motor.
Robert A

2014 535d, M Sport, Space Gray/Mocha Nappa
2007 530i, White/Black, 6MT
2001 530i, Orient Blue/Beige, 5MT
1994 325is, White/Black 5MT
1984 325e, White/Black 5MT
1983 318i, Delphin/Beige 4MT
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