The main difference between the 1955 Chevy 210 and the 1955 Chevy BelAir was the amount of extras you could get for about $100 more. The BelAir was the more luxurious model. The Chevy 210, $100 cheaper, was the forerunner of the BelAir and did not have the more luxurious interior like that of the BelAir. More BelAirs were sold than 210's and it was discontinued in 1957. The BelAir was in production until 1981.