ECAR meaning in General ?

Economy car is a term mostly used in the United States for cars designed for low-cost purchase and operation. Typical economy cars are small (compact or subcompact), lightweight, and inexpensive to both produce and purchase. Stringent design constraints generally force economy car manufacturers to be inventive. Many innovations in automobile design were originally developed for economy cars, such as the Ford Model T and the Austin Mini.

Gordon Murray, the Formula 1 and McLaren F1 designer, said when designing his new Murray T.25 city car: "I would say that building a car to sell for six thousand pounds and designing that for a high-volume production, where you have all the quality issues under control, is a hundred times more difficult than designing a McLaren F1, or even a racing car. It is certainly the biggest challenge I've ever had from a design point of view."