I've just been looking at the speeds achieved by Maccas at the vmax event I sometimes participate in, this is a 1.6 mile runway.
(918 Spider 203mph)
675LT = 203mph
12C between 191 and 195mph (different cars)
On a different day
(918 Spider 205mph)
570S 183mph
The 570S in the test has been tweaked for sure
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997 GT2 2014 3.9 Mezger, 800PS @ 1.2 bar