Technical Specifications
| Brand | BMW |
| Model | 3 Series |
| Generation | 3 Series Sedan (G20 LCI, facelift 2022) |
| Type (Engine) | 320i (184 Hp) Steptronic |
| Start of production | July, 2022 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Combined fuel consumption (WLTP) | 6.4-7.2 l/100 km (36.8 – 32.7 US mpg, 44.1 – 39.2 UK mpg, 15.6 – 13.9 km/l) |
| CO2 emissions (WLTP) | 145-162 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 7.4 sec |
| Acceleration 0 – 62 mph | 7.4 sec |
| Acceleration 0 – 60 mph | 7 sec |
| Maximum speed | 235 km/h (146.02 mph) |
| Emission standard | Euro 6d |
| Weight-to-power ratio | 8.2 kg/Hp, 121.5 Hp/tonne |
| Weight-to-torque ratio | 5.1 kg/Nm, 198 Nm/tonne |
| Power | 184 Hp @ 5000-6400 rpm |
| Power per litre | 92.1 Hp/l |
| Torque | 300 Nm @ 1350-4000 rpm (221.27 lb.-ft. @ 1350-4000 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | B48B20B |
| Engine displacement | 1998 cm3 (121.93 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 82 mm (3.23 in.) |
| Piston Stroke | 94.6 mm (3.72 in.) |
| Compression ratio | 11:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | Twin-power turbo, Intercooler |
| Valvetrain | VALVETRONIC |
| Engine oil capacity | 5.25 l (5.55 US qt | 4.62 UK qt) |
| Kerb Weight | 1515 kg (3340 lbs.) |
| Max. weight | 2070 kg (4563.57 lbs.) |
| Max load | 555 kg (1223.57 lbs.) |
| Trunk (boot) space – minimum | 480 l (16.95 cu. ft.) |
| Fuel tank capacity | 59 l (15.59 US gal | 12.98 UK gal) |
| Max. roof load | 75 kg (165.35 lbs.) |
| Permitted trailer load with brakes (12%) | 1600 kg (3527.4 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Permitted towbar download | 75 kg (165.35 lbs.) |
| Length | 4713 mm (185.55 in.) |
| Width | 1827 mm (71.93 in.) |
| Height | 1440 mm (56.69 in.) |
| Wheelbase | 2851 mm (112.24 in.) |
| Front track | 1573 mm (61.93 in.) |
| Rear (Back) track | 1568 mm (61.73 in.) |
| Ride height (ground clearance) | 141 mm (5.55 in.) |
| Drag coefficient (Cd) | 0.25 |
| Minimum turning circle (turning diameter) | 11.4 m (37.4 ft.) |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the rear wheels of the vehicle. |
| Drive wheel | Rear wheel drive |
| Number of gears and type of gearbox | 8 gears, automatic transmission Steptronic |
| Front suspension | Independent, type McPherson with coil spring and anti-roll bar |
| Rear suspension | Independent multi-link spring suspension with stabilizer |
| 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 | 225/50 R17 |
| Wheel rims size | 7.5J x 17 |
The BMW 3 Series Sedan (G20 LCI), specifically the 320i variant equipped with the Steptronic 8-speed automatic transmission, represents a significant update to BMW’s highly successful compact executive car. Introduced with the Life Cycle Impulse (LCI) facelift in July 2022, this model builds upon the G20 generation, which debuted in 2019. The 320i Steptronic serves as a key entry point into the 3 Series range, offering a balance of performance, efficiency, and luxury features. It’s positioned as a more accessible alternative to the higher-performance and more expensive models like the 330i and M340i, targeting buyers who prioritize a refined driving experience and modern technology.
Powertrain & Engine Architecture
At the heart of the 320i Steptronic lies the BMW B48B20B 2.0-liter inline-four cylinder engine. This engine is a member of BMW’s modular engine family, known for its efficiency and performance. It utilizes direct fuel injection, a single twin-scroll turbocharger, and BMW’s VALVETRONIC variable valve timing and lift technology. VALVETRONIC allows for precise control of valve timing and lift, optimizing engine performance and fuel economy across a wide range of driving conditions. The engine produces 184 horsepower at 5000-6400 rpm and 300 Nm (221 lb-ft) of torque between 1350 and 4000 rpm. The Steptronic transmission is an 8-speed automatic, offering smooth and responsive gear changes. It features adaptive shift programs that adjust to the driver’s style and the driving situation.
Driving Characteristics
The 320i Steptronic delivers a comfortable and refined driving experience. While not as overtly sporty as the 330i, it provides ample power for everyday driving and highway cruising. The 0-60 mph acceleration time of around 7 seconds is respectable. The Steptronic transmission contributes to a smooth and effortless driving experience, particularly in city traffic. The gear ratios are well-chosen to provide good acceleration and fuel efficiency. Compared to a manual transmission version, the Steptronic offers greater convenience, but some drivers may find it less engaging. The engine’s torque delivery is strong from low revs, making it easy to navigate traffic and overtake other vehicles.
Equipment & Trim Levels
The 320i Steptronic typically comes standard with a comprehensive suite of features, including BMW’s iDrive infotainment system with a touchscreen display, automatic climate control, power-adjustable seats, and a suite of driver-assistance systems such as lane departure warning and forward collision warning. Optional extras include a premium sound system, a head-up display, leather upholstery, and a panoramic sunroof. The LCI facelift brought updated interior trim options and new exterior colors. The standard upholstery is typically a high-quality cloth, with leatherette or full leather available as upgrades.
Chassis & Braking
The 320i Steptronic utilizes a McPherson strut front suspension and a multi-link rear suspension, providing a good balance of ride comfort and handling precision. The suspension is tuned to prioritize comfort, but it still offers a reasonably sporty feel. The braking system consists of ventilated disc brakes on all four wheels, providing ample stopping power. ABS (Anti-lock Braking System) and electronic stability control are standard features. The steering is precise and well-weighted, providing good feedback to the driver.
Market Reception & Comparison
The 320i Steptronic has been well-received by critics as a practical and well-rounded entry-level 3 Series. It offers a good balance of performance, efficiency, and luxury features at a competitive price point. Compared to the 330i, the 320i offers less power and a slightly less refined driving experience, but it is more fuel-efficient and more affordable. The 320i’s fuel economy is a strong point, with combined fuel consumption figures ranging from 6.4 to 7.2 liters per 100 kilometers (36.8 to 32.7 US mpg). Reliability has generally been good, although some owners have reported minor issues with the infotainment system.
Legacy
The B48 engine family, including the B48B20B found in the 320i, has proven to be a reliable and durable powertrain. The Steptronic 8-speed automatic transmission is also known for its smooth operation and longevity. In the used car market, the 320i Steptronic represents a good value proposition, offering a premium driving experience at a reasonable price. Its combination of comfort, efficiency, and technology makes it a popular choice among buyers looking for a well-rounded compact executive car. Regular maintenance, including oil changes and fluid checks, is crucial to ensure the long-term reliability of this powertrain.
