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
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
Current: '07 530i, White/Black, MT
Retired: '01 530i, '94 325is, '84 325e, '83 318is, Mazda RX2, VW Scirocco, Mazda RX7