I don't know if this is faster than the Model S or the Roadster; but it's serenely beautiful: [video=vimeo;53914149]http://vimeo.com/53914149[/video]
IMO a Cheetah is like the Roadster... Very fast acceleration, but can't hold the speed long. I remember hearing that the Cheetah when at speed gets so hot that it will have to slow down in about 30 seconds or suffer brain damage from overheating. Reminds me of taking the Roadster out on the track, after about 10 minutes of hard driving I got power limited due to motor heat.