Re the 720S I think the incredible 0-200 time of 7.2s is what makes the 200-300 so fast at 19.4s, if we take the 200-300 at 12.2s this actually about right for 720PS. 750PS 997GT2s from Sportec and 9ff were tested at 200-300 in 11.8/11.4s (respectively) these were 100kg/81kg heavier and the drivers had to shift gears manually.

The 720S was measured at 745PS/771NM by the Insoric dyno system, the American attempts at dynoing resulting in the usual yeehaaa wild claims of 800hp are just par for the course and of course liked by all those punters whose 850hp modded cars are getting spanked by a real 750PS car indecision 

The 570S I agree is a bit more puzzling its best test was 0-200 in 8.5s and 0-300 in 24.7 so 200-300 in 16.2s which is about what my similar weight 997GT2 was achieving when I ran at 659PS (measured on engine dyno) remember manual gear changes worth prob 1s -I suspect the 570 makes its rated torque of 600NM all the way up to peak power at 7500 which would mean 630hp, it certainly feels like this the torque does not seem to dip as the revs rise to peak..... I took mine to the speeds we are talking about here the other day and a warning chime coupled with tyre warning light came on, reminding you that for speeds over 200 the tyre pressure has to be raised significantly frown


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997 GT2 2014 3.9 Mezger, 800PS @ 1.2 bar

McLaren 570S 

993 Turbo, 2006 built 3.8, 577PS/797NM, 1440kg DIN sold to a worthy enthusiast.