haven't even checked.
but I have figured out that it will vary greatly depending on what your "real life driving" means.
shifting manually in Alfa or lambo mode, appropriate use of throttle, hey it's gonna burn some fuel!
leave it in auto shift, it's in a much higher gear, next to no boost until you step on it, and I'm sure it's using not much at all.
in (very) briefly trying auto ferrari and aston mode, I'm sure you can get numbers to brag about - and maybe if we do a long boring interstate cruise we will, but otherwise, why buy this car?