NISSAN in the 80s with the early years of the skyline wanted a sportier race car lil brother version of the skyline and they came out with the twin turbo Z32. I am studying car design....the guy that designed the DIABLO did say ok lets start with a V8 then goto a V12. They made the NA for the market cause most people can not afford a TT when it came out and some people are leary of turbocharged cars especially american consumers...admit it, I know my stuff.