The Sinclair C5, an electric-assisted tricycle, was launched in 1985 and was not a commercial success.
Created by Sir Clive Sinclair, who was also famous for helping develop the pocket calculator and the ZX spectrum computer, the C5 was a low-slung tricycle with a plastic body and roof, and was marketed as an affordable, clean energy vehicle.
It was faltered due to its limited range and performance, leading to it being discontinued shortly after its release.
However, it has since become something of a cult item, and some are interested in how it drove relative to how it was portrayed in theory, which is explained in the linked article.
It examines one restorer’s C5, highlighting both its strengths and weaknesses.
The article also notes that most C5s have had performance enhancements.