Herbaliser:

For improved high speed acceleration you need horsepower, not improved mid-range torque.  The car is rated at 580hp. It might maintain higher boost in the middle rpm range but obviously not much more at top rpm. Otherwise it wouldn't be only 20hp more. Given the insignificant improvement in the 0-200 acceleration, the 0-300 will be even less significant. So I bet that it's going to be 28+ :)

For 200-300kph acceleration you need the power to b real and not be heat soaked away, this new turbo has bigger turbos which will achieve cooler intake charge at full load. 200 to 300kph will take about 16.5s which is correct for real 580PS on a PDK

My 993 turbo with (engine dyno) real 580PS achieves 200-300 in 17s including lots of manual gear changing.

There are lots of cars out there whose quoted horse power wilts once loaded over 200kph, the 918 being one of them however the "wilt" is all relative Smiley


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997 GT2 2014 3.9 Mezger, 800PS @ 1.1 bar