If you are looking for such car and how butty feeling you will get. Then, you would not really bother your self to ask about fuel consuming, but any way, I got 745 Turbo, and its need not less than 12 litter in 100 km/h. this is if you are driving it with avrage speed of 140 km/h in high way.
this number will increase too much if it in the city.
notes: my car is not running as its new, it may need some tunning as well.

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