The BMW 4 Series Convertible (F33) 440i xDrive Steptronic represents a compelling blend of performance, luxury, and open-air driving enjoyment. Produced from 2016, this variant occupied a significant position within the F33 generation, serving as a step up from the 428i and a more accessible alternative to the higher-performance M4 Convertible. It was designed to appeal to buyers seeking a sophisticated and powerful convertible experience with the added security of BMW’s xDrive all-wheel-drive system and the convenience of an eight-speed automatic transmission.
Technical Specifications
| Brand | BMW |
| Model | 4 Series |
| Generation | 4 Series Convertible (F33) |
| Type (Engine) | 440i (326 Hp) xDrive Steptronic |
| Start of production | 2016 |
| End of production | 2016 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Cabriolet |
| Seats | 4 |
| Doors | 2 |
| Fuel consumption (urban) | 9.8-10.3 l/100 km (24 – 22.8 US mpg) |
| Fuel consumption (extra urban) | 5.8-6.1 l/100 km (40.6 – 38.6 US mpg) |
| Fuel consumption (combined) | 7.3-7.6 l/100 km (32.2 – 30.9 US mpg) |
| CO2 emissions | 169-177 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 5.4 sec |
| Acceleration 0 – 62 mph | 5.4 sec |
| Acceleration 0 – 60 mph | 5.1 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 5.7 kg/Hp, 176.2 Hp/tonne |
| Weight-to-torque ratio | 4.1 kg/Nm, 243.2 Nm/tonne |
| Power | 326 Hp @ 5500 rpm |
| Torque | 450 Nm @ 1380-5000 rpm (331.9 lb.-ft. @ 1380-5000 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | B58B30A |
| Engine displacement | 2998 cm3 (182.95 cu. in.) |
| Number of cylinders | 6 |
| 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 |
| Engine oil capacity | 6.5 l (6.87 US qt | 5.72 UK qt) |
| Coolant | 9.3 l (9.83 US qt | 8.18 UK qt) |
| Kerb Weight | 1850 kg (4078.55 lbs.) |
| Max. weight | 2300 kg (5070.63 lbs.) |
| Max load | 450 kg (992.08 lbs.) |
| Trunk (boot) space – minimum | 370 l (13.07 cu. ft.) |
| Fuel tank capacity | 60 l (15.85 US gal | 13.2 UK gal) |
| Permitted trailer load with brakes (12%) | 1800 kg (3968.32 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Permitted towbar download | 75 kg (165.35 lbs.) |
| Length | 4638 mm (182.6 in.) |
| Width | 1825 mm (71.85 in.) |
| Height | 1399 mm (55.08 in.) |
| Wheelbase | 2810 mm (110.63 in.) |
| Front track | 1544 mm (60.79 in.) |
| Rear (Back) track | 1590 mm (62.6 in.) |
| Ride height (ground clearance) | 145 mm (5.71 in.) |
| Drag coefficient (Cd) | 0.31 |
| Minimum turning circle (turning diameter) | 11.8 m (38.71 ft.) |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 8 gears, automatic transmission Steptronic |
| 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 | 225/50 R17 98W; 225/45 R18; 255/40 R18; 225/40 R19; 255/35 R19 |
| Wheel rims size | 7.5J x 17; 8J x 18; 8.5J x 18; 8J x 19; 8.5J x 19 |
INTRODUCTION
The BMW 440i xDrive Convertible, launched in 2016, built upon the success of the F33 4 Series, offering a more potent and refined experience than its four-cylinder siblings. It slotted into the lineup as the premium gasoline-powered option before the arrival of the M4 Convertible, appealing to drivers who desired a balance of performance, luxury, and all-weather capability. The F33 generation itself was a significant step forward for BMW, representing a split from the 3 Series coupe/convertible tradition and establishing the 4 Series as a distinct model range.
Powertrain & Engine Architecture
At the heart of the 440i lies the B58B30A 3.0-liter inline-six engine. This engine is a masterpiece of modern engineering, featuring a single twin-scroll turbocharger, direct fuel injection, and BMW’s Valvetronic variable valve timing and variable valve lift technology. The B58 engine is known for its smooth power delivery, responsiveness, and overall refinement. It produces 326 horsepower at 5,500 rpm and a robust 450 Nm (331.9 lb-ft) of torque between 1,380 and 5,000 rpm. This broad torque curve contributes to strong acceleration in real-world driving conditions.
The engine is paired with BMW’s eight-speed Steptronic automatic transmission. This transmission is renowned for its quick and seamless shifts, contributing to both performance and fuel efficiency. The xDrive all-wheel-drive system intelligently distributes power between the front and rear axles, enhancing traction and stability, particularly in adverse weather conditions. The transmission’s gear ratios are tuned to provide a balance between acceleration and cruising efficiency, with a relatively tall final drive ratio for improved highway fuel economy.
Driving Characteristics
The 440i xDrive Convertible delivers a driving experience that is both engaging and comfortable. The combination of the potent inline-six engine, the responsive automatic transmission, and the xDrive all-wheel-drive system results in brisk acceleration and confident handling. While not as overtly sporty as the M4 Convertible, the 440i offers ample power for spirited driving on winding roads. The xDrive system provides a reassuring level of grip, allowing drivers to confidently explore the car’s performance limits. Compared to the 428i, the 440i offers a noticeable increase in power and torque, resulting in significantly quicker acceleration and a more effortless driving experience. The automatic transmission, while convenient, doesn’t offer the same level of driver engagement as a manual gearbox.
Equipment & Trim Levels
The 440i xDrive Convertible came well-equipped as standard. Typical features included leather upholstery, power-adjustable seats with memory function, a premium sound system, automatic climate control, and BMW’s iDrive infotainment system with a central display screen. Optional extras included features such as a head-up display, navigation system, adaptive cruise control, and a Harman Kardon surround sound system. Interior trim options allowed buyers to personalize the cabin to their tastes, with choices ranging from wood veneers to aluminum accents. The convertible top was a fully automatic, retractable hardtop, providing both open-air driving enjoyment and the security of a coupe when closed.
Chassis & Braking
The F33 4 Series Convertible features a sophisticated chassis design, with an independent suspension at all four corners. The front suspension utilizes coil springs and struts, while the rear suspension employs a multi-link setup. This configuration provides a good balance between ride comfort and handling precision. The 440i xDrive typically came equipped with larger brakes than the base models, featuring ventilated discs at all four corners. ABS (Anti-lock Braking System) and electronic stability control were standard safety features. The steering system is a rack-and-pinion setup with electric power assistance, providing precise and responsive steering feel.
Market Reception & Comparison
The 440i xDrive Convertible was generally well-received by automotive critics. Reviewers praised the engine’s performance, the transmission’s smoothness, and the all-wheel-drive system’s capability. The car was often lauded for its blend of luxury, performance, and practicality. Compared to the 428i, the 440i offered a significant performance upgrade, justifying the higher price tag for buyers seeking more power. Fuel economy was respectable for a performance convertible, although not class-leading. Reliability reports have generally been positive, with the B58 engine proving to be a durable and dependable unit.
Legacy
The BMW 440i xDrive Convertible (F33) remains a desirable used car today. The B58 engine has earned a reputation for its longevity and relatively low maintenance costs. The combination of performance, luxury, and all-weather capability makes it a compelling option for buyers seeking a premium convertible experience. While newer 4 Series convertibles offer more advanced technology and features, the F33 440i continues to provide a rewarding and enjoyable driving experience, representing a sweet spot in the BMW convertible lineup.
