Apparently they are 2/10 second faster than a Ferrari Enzo from 0-100 and back down again, and cost about fifteen times less. They are street legal and made in Britain.
I've seen these on the road and they are surely fast as fuck. I've never driven one but they look like great fun.
http://www.westfield-sportscars.co.u.../xtr2imola.wmv
http://www.westfield-sportscars.co.u...onza071203.wmv
http://www.westfield-sportscars.co.u...egabusamix.wmv
http://www.westfield-sportscars.co.u...urburgring.wmv
This is what one looks like from the outside:
