Technical Specifications
| Specification | 1977 BMW 320i |
|---|---|
| Model Year | 1977 |
| Chassis Code | BMW E21 |
| Body Style | 2-door sedan/coupe |
| Engine | M10 inline-four |
| Displacement | 1,990 cc / 2.0 L |
| Fuel Delivery | Bosch K-Jetronic continuous fuel injection |
| Maximum Power | 110 hp at 5,700 rpm |
| Maximum Torque | 112 lb-ft / 152 Nm at 4,000 rpm |
| Engine Position | Front-engine |
| Drive Layout | Rear-wheel drive |
| Standard Transmission | 4-speed manual |
| Optional Transmission | 3-speed automatic |
| Front Suspension | Independent MacPherson struts with anti-roll bar |
| Rear Suspension | Independent semi-trailing arms with coil springs |
| Front Brakes | Power-assisted disc brakes |
| Rear Brakes | Drum brakes |
| Steering | Rack-and-pinion |
| Curb Weight | Approximately 2,500 lb / 1,140 kg |
| Weight Distribution | 50% front / 50% rear |
Powertrain Analysis
The 1977 BMW 320i uses the M10 1,990 cc inline-four engine. Maximum output is 110 hp at 5,700 rpm, while peak torque is 112 lb-ft, equivalent to 152 Nm, at 4,000 rpm. The powertrain uses Bosch K-Jetronic continuous mechanical fuel injection.
The drivetrain configuration places the engine at the front and sends power to the rear wheels. This front-engine, rear-wheel-drive layout is paired with a standard 4-speed manual transmission. A 3-speed automatic transmission is available as an alternative.
The 110 hp output occurs 1,700 rpm above the 4,000-rpm torque peak. The M10 inline-four, K-Jetronic injection system, 4-speed manual transmission, and rear-wheel-drive configuration define the 1977 320i mechanical specification.
Chassis & Dynamics
The BMW E21 chassis uses independent suspension at both axles. The front suspension consists of MacPherson struts and an anti-roll bar, while the rear suspension uses semi-trailing arms with coil springs.
The braking system combines power-assisted front disc brakes with rear drum brakes. Steering is rack-and-pinion, linking the front-wheel steering system to the E21 chassis configuration.
Approximately 2,500 lb, or 1,140 kg, of curb weight is distributed at a 50% front and 50% rear balance. The 50/50 distribution is combined with the front-engine and rear-wheel-drive layout, independent front suspension, and independent rear semi-trailing-arm suspension.
Dimensions & Practicality
The 1977 BMW 320i is configured as a two-door sedan/coupe on the E21 chassis. Its body profile uses slim roof pillars, an upright cabin structure, and the Hofmeister kink at the C-pillar.
The driver compartment uses an angled center console that positions the primary controls and gauges toward the driver. The exterior specification includes BMW twin-kidney grille architecture, a forward-canted front fascia, side rubbing strips, and multi-spoke turbine-style alloy wheels.