 With 72,412 sold in 1977 alone the car was initially popular, outselling the Polo sister model in that year, but sales quickly tailed off in subsequent years.During 1981, Volkswagen introduced the second generation Polo and the second generation Derby; in 1984 the Derby name was dropped and the saloon version of the Polo became the Volkswagen Polo Classic.Most parts of the Derby are interchangeable with the Mk1 Polo, and many drivetrain components are compatible with the Mk2 models.