Quote:
Originally Posted by The X Men
I have owned quite a few cars with direct injection, the F30 is by far the worst sounding of them all. I am not so sure its not piston slap like the old GM and Toyota engines.
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True, but I guess it's a BMW thing. N54 has a slight diesel idle as well but no where near as bad as the N20. The way BMW engineers probably designed the N20 was probably loosely based on some of their DI turbo diesels, of course not completely since diesels only use DI and extremely high compression instead of spark plugs and what not but still could be a possibility....
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