From introduction of the concept, to the start of production of the production model, what is the car with the longest span between them? I’m specifically referring to concepts which had a major direct design influence on the production model. There may be minor influences, but the 2021 Ford Bronco is clearly not a production version of the 2004 Ford Bronco Concept.
My best guess is the 2005 Citroën C-SportLounge Concept, which was revealed on September 2005...
...and entered production as the 2011 Citroën DS5 on November 2011. That’s 74 months! That’s more than the 71 months from the Bugatti EB 18.4 concept to the Bugatti Veyron, and the 60 months from the Lexus LF-A concept to the Lexus LFA, both cars known for being stuck in development hell. They may have longer overall development times (or not, we may never know with the DS5), but from concept to production, the Citroën beats them. But there’s got to be a longer one out there. Help me out Oppo.