sorry i've been away for a while, been having major problems sleeping so i've been getting in from work and going straight to bed!
i remember hearing about the speed 12 years ago, apparently the reason why it was dropped from production to the public was because the government frowned on a car with a power-to-weight ratio of over 1 being available to the general public, they probably thought they might see another 'cobra 427 on the M1' type affair happening again and stopped tvr before they could build it. race organisers banned it from the track after a while too for being outrageously powerful and stupidly hard to control, hence dangerous to everyone. still, thumbs up to tvr for trying!
the reason why we have a national speed limit of 70mph on motorways, someone took a AC Cobra 427 flat-out down the M1 and crashed it, wiped out quite a few people I heard, must have been about 160+mph or so, which is blisteringly fast back in the 60's. cobra 427's were nicknamed 'widowmakers' because of their habit of killing their drivers.