Question: what is the difference between bmw f20 and f21?
Answer: The second generation of the BMW 1 Series consists of the BMW F20 (5-door hatchback version) and BMW F21 (3-door hatchback version) compact cars. ... Unlike most hatchback competitors, the F20/F21 uses a longitudinally mounted engine and rear-wheel drive (instead of front-wheel drive) for most models.