Summary: Model Range
- 315: The most economical model, introduced to the market in reaction to the second "oil crisis" in late 1979, with a 4-cylinder M10 1.6 L engine and a single downdraft carburetor, 75 bhp (56 kW; 76 PS). More spartan than the other E21 models, it was the last E21 to be built and shared production with the E30.
- 316: The original 3-series base model with M10 1.8 L engine, 90 bhp (67 kW; 91 PS).
- 318: Slightly more powerful version 98 bhp (73 kW; 99 PS) with 1.8 L engine.
- 318i: An upgraded version of the 316 featuring the M10 1.8 L engine fitted with a Bosch K-Jetronic fuel injection system, introduced in 1979 as successor to the carburetted 318.
- 320: Featured an M10 four-cylinder engine with a Solex 2-barrel downdraft carburetor, 109 bhp (81 kW; 111 PS).
- 320i: Upgraded version of 320 with an M10 engine; Bosch K-Jetronic (LambdaO2) fuel injection, 125 bhp (93 kW; 127 PS) and limited slip differential also as an option.
- 320/6: Featured the new BMW 6-cylinder engine, the M20 2.0 L, and a Solex 4-barrel downdraft carburetor; replaced the 320/4 from 1979 on.
- 320is: The 1980 320is for North America offered Recaro seats, a rear antiroll bar, a limited-slip differential, cross-spoke wheels, a larger-diameter front antiroll bar, a 3-spoke leather-wrapped steering wheel, and a special front air dam.
- 323i: Featuring the M20 and Bosch K Jetronic fuel injection, the 323i was the top model of the line with 143 bhp (107 kW; 145 PS) and four-disc power-assisted brakes. Options include power steering, a 5-speed close-ratio 'dogleg' sport gearbox, and 25% limited slip differential.
Read more about this topic: BMW 3 Series (E21)
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