Bmw M5 E39 100-300 Km/h (by Javi930) (20.10.2011)
100-160 kph: 6.0 s
100-200 kph: 11.4 s
100-250 kph: 26.0 s
Max. speed: 295 kph
https://youtu.be/dFgVIGXWzQ0 (Vmax- and stopwatch-verified)
*excludes 100-300kph time (despite the video title) because Vmax confirms a little slower