That 2007 M6 reaching 332Kph was also a Kelleners Racing M6 which did do a GPS Verified top speed of that, But that wasn't stock, No stock M5/M6 goes past 200Mph, The fastest TRUE GPS VERIFIED top speed of a M5/M6 is 194Mph, 315ph, Theres a SHITE LOAD of speedo videos, And everyone thinks there doing that, even some saying they did 211Mph and 215Mph lol Its true, Bmws are slippery.
But not slippery enuff to do 330Kph plus, Not with 500Bhp. However though, as far as the 194Mph time is concerned, I do not know if its its FULL top speed, or if there was room for more. But a lot of this 200Mph+ stuff is only based on a speedo video on Youtube, And those can be anywhere between 15-30kph off. Like these videos...ALL speedos without a single spec of proof.
As far as the CC V8S is concerned, 240Mph is only a "Claimed" top speed, No Koenigsegg has registered its claimed aerodynamic value tested, So I Highly doubt it would even go past 225Mph let alone 240Mph. Correct me if im wrong people.