Lots of good info in the NSX Wiki (link at the top of the page).
http://www.nsxprime.com/wiki/Category:Learning
In 1984 Honda commissioned the Italian car designer Pininfarina to design the HP-X (Honda Pininfarina Xperimental),which had a mid-mounted C20A 2.0 L V6 configuration.
After Honda decided to pursue the project its management informed its engineers that the new car would have to be as fast as anything coming from Italy and Germany. The HP-X concept car evolved into the NS-X (New Sportscar eXperimental) prototype. The NS-X prototype and eventual production car were designed by a team led by Chief Designer Ken Okuyama and Executive Chief Engineer Shigeru Uehara, who subsequently would be placed in charge of the S2000 project.