Your car design is improving now. The Virgo is visually a huge step up from your previous creations and it’s looking period correct while not looking boring even if it’s rather simple. I would call it efficient.
OHC engines, even those with 2 valves per cylinder, might be a bit too modern for a 50s American sedan, as they used OHV engines well into the 80s for almost all their vehicles. Maybe the Virgo was a sports saloon with more advanced engines than most competitors had?
its a normal limo but more advanced