I'm trying to predict the price of the 4.8i V8 vs. the 3.0sd twin turbo I6 for the 2009 MY in the USA. Does anyone know the price in Europe for one vs. the other (trying to match options) so I can see what the savings are on the diesel? I'm looking for a percentage difference. I'm guessing that it will be more than the 3.0si but less than the 4.8i.

Since I'm looking for an X5 to tow, I'm looking between the 3.0sd and the 4.8i. Perhaps I should consider the 3.0si too - any comments on towing with the twin turbo gas engine?

Thanks in advance.

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1995 BMW M3 (Track prepared)
2006 BMW 530xi (Wife)
2011 BMW X5 35d (Tow/Daily)