From a cut-in-half City to a Ferrari-fighter
The NSX traces back to early-1980s Honda experiments — famously a Honda City test mule cut in half with the engine moved behind the driver. That fed into the 1984 Pininfarina-designed HP-X concept, which evolved into the NS-X prototype ("New Sports eXperimental"). The production car was led by Executive Chief Engineer Shigeru Uehara and Chief Designer Masahito Nakano. Honda's brief was explicit: match Italian and German supercars, but do it with Honda reliability and a lower price.
The VTEC V6 and the aluminum body
The original plan used a non-VTEC 3.0-liter DOHC V6. Late in development — reportedly at the urging of Honda president Tadashi Kume — the engine was re-engineered to use VTEC, gaining a stronger block and titanium connecting rods that pushed the redline to 8,000 rpm. The new C30A was physically larger, forcing engineers to tilt it back about 5 degrees to fit. The body was the other headline: an all-aluminum monocoque, a production first, paired with aluminum suspension arms and (later) the first electronic throttle in a Honda road car.
Senna's role — handled carefully
The popular story is that Ayrton Senna "developed" the NSX. The more careful, sourced version: Senna, then a Honda-powered McLaren F1 driver, tested a prototype at Suzuka and told Honda the chassis felt insufficiently rigid. Honda used that feedback (among other inputs) and ultimately stiffened the structure by over 50%. But Wikipedia, citing Japanese-language sources, explicitly cautions that Senna was *not* the development driver — he drove the car only a handful of times and offered advice. The actual lead development driver was Motoharu "Gan-san" Kurosawa, with much chassis work done at the Nürburgring, plus on-track input from Satoru Nakajima and Bobby Rahal. We present Senna's contribution as real but limited, and flag the "development driver" framing as a disputed/overstated claim.
Variants and the long run
Over 15 years the NSX spawned a broad family: the original Coupe; the targa-roofed NSX-T (1995-on); the JDM track-special NSX-R / Type R (NA1, ~1992–95); the JDM Type S and ultra-rare Type S-Zero (1997–2001); the US-only Alex Zanardi Edition (1999, 51 cars); and a second NSX-R (NA2) on the 2002 facelift car. The big mechanical watershed was 1997, when manual cars got the larger 3.2-liter C32B (the NA2) and a 6-speed gearbox; automatics kept the 3.0 (NA1) to the end. In December 2001 the car was facelifted — most visibly, the pop-up headlamps gave way to fixed xenon units — and it ran in that form until production ended 30 November 2005.