It was built from 1975 to 1983 as two-door convertible and sedan with a front engine and rear-wheel-drive. It was available with three speed automatic ZF 3HP22 transmission, and 4 and five speed Getrag manual transmission BMW E21 was the first model introduced from the 3 Series, as a two-door sedan with the four-cylinder engine running on petrol. In 1975 were introduced fuel-injected engines for the models. In 1977 were introduced six-cylinder engine. It was available as cabriolet first in 1978. Limited versions were also produced. It was with kidney grille, Hofmeister kink, safer interior, rack and pinion steering, MacPherson strut suspension, disc brakes on the front and drum brakes on the rear wheels. Getrag was the standard four-speed manual transmission and three-speed automatic ZF 3 HP-22 transmission.
315, It was produced between 1981 and 1983 with 1.6 liters engine able to reach 154 km per hour.
316, It was constructed between 1975 and 1981, ready to run with up to 160 km per hour. It had an update on the engine in the last years to 1.8 liters, and top speed increased to 167 km per hour.
318, It was powered by a four-cylinder engine, with a top speed of 165 km per hour.
318i, It was introduced in 1980, as a replacement for 318. It had a maximum speed of 173 km per hour.
320, It was with a Solex 2-barrel carburetor and four-cylinder engine able to reach 170 km per hour speed. A sports version known as Flying Brick was introduced with 302 bhp.
320i was launched in 1975 with a top speed of 182 km per hour.
320/6, In 1977 on 320 was updated six-cylinder engine BMW M20 with a Solex 4-barrel downdraft carburetor, able to reach 180 km per hour.
323i, It was the top E21 introduced in 1979 with a 2.3 liters six-cylinder engine with K-Jetronic fuel-injection and the highest speed of 200 km per hour.
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