The BMW 3 Series Coupe (E92 LCI), specifically the 320i variant equipped with the Steptronic automatic transmission, was produced from 2010 to 2013. This model represents a facelift of the E92 generation, bringing updated styling and technology to BMW’s popular compact executive coupe. Positioned as an entry-level offering within the 3 Series Coupe range, the 320i Steptronic provided a balance of performance, efficiency, and affordability, appealing to buyers seeking a premium driving experience without the higher price tag of the more powerful 335i or 330i models. It served as a key model in the North American and European markets, offering a sophisticated alternative to competitors like the Audi A5 Coupe and Mercedes-Benz C-Class Coupe.
Technical Specifications
| Brand | BMW |
| Model | 3 Series |
| Generation | 3 Series Coupe (E92 LCI, facelift 2010) |
| Type (Engine) | 320i (170 Hp) Steptronic |
| Start of production | 2010 |
| End of production | 2013 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe |
| Seats | 4 |
| Doors | 2 |
| Fuel consumption (urban) | 9.3 l/100 km (25.3 US mpg) |
| Fuel consumption (extra urban) | 5.3 l/100 km (44.4 US mpg) |
| Fuel consumption (combined) | 6.8 l/100 km (34.6 US mpg) |
| CO2 emissions | 159 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 8.8 sec |
| Acceleration 0 – 62 mph | 8.8 sec |
| Acceleration 0 – 60 mph | 8.4 sec |
| Maximum speed | 228 km/h (141.67 mph) |
| Emission standard | Euro 5 |
| Weight-to-power ratio | 8.2 kg/Hp |
| Weight-to-torque ratio | 6.6 kg/Nm |
| Power | 170 Hp @ 6700 rpm |
| Torque | 210 Nm @ 4250 rpm (154.89 lb.-ft. @ 4250 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | N43B20A |
| Engine displacement | 1995 cm3 (121.74 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 84 mm (3.31 in.) |
| Piston Stroke | 90 mm (3.54 in.) |
| Compression ratio | 12:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine oil capacity | 4.25 l (4.49 US qt | 3.74 UK qt) |
| Coolant | 9.2 l (9.72 US qt | 8.09 UK qt) |
| Kerb Weight | 1390 kg (3064.43 lbs.) |
| Max. weight | 1840 kg (4056.51 lbs.) |
| Max load | 450 kg (992.08 lbs.) |
| Trunk (boot) space – minimum | 440 l (15.54 cu. ft.) |
| Fuel tank capacity | 63 l (16.64 US gal | 13.86 UK gal) |
| Max. roof load | 75 kg (165.35 lbs.) |
| Permitted trailer load with brakes (12%) | 1500 kg (3306.93 lbs.) |
| Permitted trailer load without brakes | 695 kg (1532.21 lbs.) |
| Permitted towbar download | 75 kg (165.35 lbs.) |
| Length | 4612 mm (181.57 in.) |
| Width | 1782 mm (70.16 in.) |
| Width including mirrors | 1961 mm (77.2 in.) |
| Height | 1395 mm (54.92 in.) |
| Wheelbase | 2760 mm (108.66 in.) |
| Front track | 1500 mm (59.06 in.) |
| Rear (Back) track | 1513 mm (59.57 in.) |
| Ride height (ground clearance) | 143 mm (5.63 in.) |
| Drag coefficient (Cd) | 0.27 |
| Minimum turning circle (turning diameter) | 11.0 m (36.09 ft.) |
| Drivetrain Architecture | Rear wheel drive |
| Number of gears and type of gearbox | 6 gears, automatic transmission |
| Front suspension | Independent coil spring |
| Rear suspension | Independent multi-link suspension |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 225/45 R17 91V |
| Wheel rims size | 8J x 17 |
Powertrain & Engine Architecture
The 320i Steptronic utilizes the BMW N43B20A engine, a 2.0-liter naturally aspirated inline-four cylinder powerplant. This engine is characterized by its direct fuel injection system, which improves combustion efficiency and power delivery. The N43 featured a relatively high compression ratio of 12:1, contributing to its respectable output. Valvetrain employed double VANOS (variable valve timing) on both intake and exhaust camshafts, optimizing engine performance across the rev range. The six-speed Steptronic automatic transmission, a torque converter type, was specifically tuned to complement the engine’s characteristics. It offered smooth shifts and a comfortable driving experience, though it wasn’t as sporty or responsive as the available six-speed manual transmission. The transmission featured adaptive shift programs, adjusting shift points based on driving style.
Driving Characteristics
The 170 horsepower and 155 lb-ft of torque produced by the N43B20A engine in the 320i Steptronic provided adequate, but not overwhelming, performance. Acceleration from 0-60 mph took approximately 8.4 seconds, and top speed was limited to 141.67 mph. Compared to the more powerful 335i models, the 320i felt noticeably slower, particularly during overtaking maneuvers. However, the automatic transmission’s gear ratios were well-matched to the engine’s powerband, providing reasonable acceleration in everyday driving situations. The Steptronic transmission prioritized comfort and fuel efficiency over outright performance, resulting in a more relaxed driving experience than the manual version.
Equipment & Trim Levels
The 320i Steptronic came standard with a respectable array of features, including automatic climate control, power windows and locks, a multi-function steering wheel, and a basic audio system. Upholstery was typically cloth, though leather options were available. The LCI facelift brought subtle interior updates, including revised trim materials and improved infotainment system options. Popular optional extras included a premium sound system, navigation system, sport seats, and a sunroof. The 320i could be further customized with various exterior styling packages, such as the Sport Package, which added aerodynamic enhancements and sport suspension.
Chassis & Braking
The E92 3 Series Coupe featured a well-engineered chassis with independent suspension at all four corners. The front suspension utilized coil springs and MacPherson struts, while the rear employed a multi-link setup. This configuration provided a good balance of ride comfort and handling precision. The 320i Steptronic typically came equipped with ventilated disc brakes on all four wheels, providing adequate stopping power. ABS (Anti-lock Braking System) was standard. Due to the lower weight compared to the six-cylinder models, the 320i generally felt more agile and responsive in corners.
Market Reception & Comparison
The 320i Steptronic was generally well-received by automotive critics as a sensible and refined entry point into the 3 Series Coupe range. It was praised for its fuel efficiency, comfortable ride, and well-appointed interior. However, some reviewers noted that the engine lacked the punch of its larger counterparts, and the automatic transmission wasn’t as engaging as the manual. Compared to the 335i, the 320i offered significantly lower running costs and insurance premiums, making it a more practical choice for budget-conscious buyers. Against competitors like the Audi A5 Coupe and Mercedes-Benz C-Class Coupe, the 320i offered a compelling combination of performance, luxury, and value.
Legacy
The N43B20A engine, while generally reliable, is known to be susceptible to certain issues, including high-pressure fuel pump failures and oil leaks. Regular maintenance, including timely oil changes and fuel system cleaning, is crucial for ensuring long-term reliability. The Steptronic automatic transmission is also generally durable, but may require servicing at higher mileages. Today, the E92 320i Coupe represents an affordable entry point into BMW ownership. Well-maintained examples are still relatively common on the used car market, offering a stylish and enjoyable driving experience for those seeking a premium coupe without breaking the bank. Its blend of practicality and driving dynamics continues to appeal to enthusiasts and everyday drivers alike.
