The BMW 1 Series M140i, produced from 2016 to 2017, represented the pinnacle of performance for the F20 LCI (Life Cycle Impulse, or facelift) generation of the 1 Series hatchback. Positioned as the range-topping model, it replaced the previous 135i and brought a significant increase in power and driving dynamics to the compact BMW lineup. This rear-wheel-drive hot hatch aimed to deliver a thrilling driving experience while maintaining a degree of practicality for everyday use. The M140i was a key offering in the European market, where the demand for high-performance, compact cars remained strong, and it marked a return to a six-cylinder engine for the 1 Series after a period of utilizing turbocharged four-cylinder engines.
Technical Specifications
| Brand | BMW |
| Model | 1 Series |
| Generation | 1 Series Hatchback 5dr (F20 LCI, facelift 2015) |
| Type (Engine) | M140i (340 Hp) |
| Start of production | 2016 |
| End of production | 2017 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Hatchback |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 10.6 l/100 km (22.2 US mpg, 26.6 UK mpg, 9.4 km/l) |
| Fuel consumption (extra urban) | 6.2 l/100 km (37.9 US mpg, 45.6 UK mpg, 16.1 km/l) |
| Fuel consumption (combined) | 7.8 l/100 km (30.2 US mpg, 36.2 UK mpg, 12.8 km/l) |
| CO2 emissions | 179 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 4.8 sec |
| Acceleration 0 – 62 mph | 4.8 sec |
| Acceleration 0 – 60 mph | 4.6 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 4.3 kg/Hp, 234.5 Hp/tonne |
| Weight-to-torque ratio | 2.9 kg/Nm, 344.8 Nm/tonne |
| Power | 340 Hp @ 5500 rpm |
| Power per litre | 113.4 Hp/l |
| Torque | 500 Nm @ 1520-4500 rpm (368.78 lb.-ft. @ 1520-4500 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 | 7.8 l (8.24 US qt | 6.86 UK qt) |
| Kerb Weight | 1450 kg (3196.7 lbs.) |
| Max. weight | 2015 kg (4442.31 lbs.) |
| Max load | 565 kg (1245.61 lbs.) |
| Trunk (boot) space – minimum | 360 l (12.71 cu. ft.) |
| Trunk (boot) space – maximum | 1200 l (42.38 cu. ft.) |
| Fuel tank capacity | 52 l (13.74 US gal | 11.44 UK gal) |
| Max. roof load | 75 kg (165.35 lbs.) |
| Length | 4324 mm (170.24 in.) |
| Width | 1765 mm (69.49 in.) |
| Height | 1411 mm (55.55 in.) |
| Wheelbase | 2690 mm (105.91 in.) |
| Front track | 1516 mm (59.69 in.) |
| Rear (Back) track | 1534 mm (60.39 in.) |
| Ride height (ground clearance) | 130 mm (5.12 in.) |
| Drag coefficient (Cd) | 0.34 |
| Minimum turning circle | 10.9 m (35.76 ft.) |
| Drivetrain Architecture | Rear wheel drive |
| Drive wheel | Rear wheel drive |
| Number of gears | 6 |
| Type of gearbox | Manual transmission |
| Front suspension | Double wishbone |
| Rear suspension | Independent multi-link suspension |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 225/40 R18; 245/35 R18 |
| Wheel rims size | 7.5J x 18; 8J x 18 |
INTRODUCTION
The BMW M140i, launched in 2016, was a significant model for the F20 1 Series range. It represented a return to form for the 1 Series, offering a potent combination of performance and practicality. Built on the UKL1 front-wheel-drive platform (though the M140i retained rear-wheel drive), the F20 LCI facelift brought updated styling and technology. The M140i served as the performance flagship until the introduction of the next-generation 1 Series (F40) in 2019. It was primarily marketed towards driving enthusiasts seeking a compact, engaging, and powerful hatchback.
Powertrain & Engine Architecture
The heart of the M140i is the B58B30A 3.0-liter inline-six engine. This engine is a member of BMW’s modular engine family and features a single twin-scroll turbocharger, direct fuel injection, and Double VANOS variable valve timing. The B58 engine is known for its smooth power delivery and robust construction. It produces 340 horsepower at 5500 rpm and a substantial 500 Nm (368 lb-ft) of torque between 1520 and 4500 rpm. The engine’s longitudinal mounting and rear-wheel-drive configuration contribute to its balanced handling characteristics. The M140i was exclusively offered with a six-speed manual transmission, a deliberate choice by BMW to cater to purists and enhance the driving experience. While an eight-speed automatic transmission was available on other 1 Series models, it was not offered on the M140i.
Driving Characteristics
The M140i delivers a genuinely engaging driving experience. The combination of the potent B58 engine and rear-wheel drive results in a car that is both quick and balanced. The six-speed manual transmission provides precise shifts and allows for a high degree of driver control. Acceleration from 0 to 60 mph takes approximately 4.6 seconds, and the car feels significantly faster in real-world driving conditions. The chassis is well-tuned, offering a good balance between comfort and handling. The steering is precise and communicative, providing ample feedback to the driver. Compared to the 125i or 130i models, the M140i offers a dramatically different level of performance, with significantly more power and torque available throughout the rev range. The manual transmission, while rewarding, requires more driver involvement than the automatic options found in other 1 Series variants.
Equipment & Trim Levels
The M140i came generously equipped as standard. Key features included sport seats, M Sport suspension, M Sport brakes, and unique exterior styling cues such as an M Sport body kit, black kidney grilles, and a rear diffuser. Inside, the M140i featured aluminum trim, M Sport steering wheel, and specific instrument cluster graphics. Optional extras included a sunroof, navigation system, Harman Kardon sound system, and various driver assistance features. Upholstery options typically included cloth and leather combinations, with full leather available as an upgrade. The overall interior design was functional and driver-focused, reflecting the car’s performance-oriented nature.
Chassis & Braking
The M140i’s chassis was specifically tuned to handle the increased power output. It featured stiffer springs and dampers compared to other 1 Series models, along with a thicker front stabilizer bar. The rear suspension utilized a multi-link setup, providing excellent wheel control and stability. The braking system consisted of ventilated discs at all four corners, providing ample stopping power. The M Sport brakes, available as an option, featured larger rotors and calipers for even greater performance. The car’s weight distribution was close to 50/50, contributing to its balanced handling characteristics.
Market Reception & Comparison
The M140i was widely praised by automotive critics for its performance, handling, and engaging driving experience. It was often compared favorably to rivals such as the Audi S3 and Mercedes-AMG A35. While the M140i offered slightly less practicality than some of its competitors, its superior driving dynamics and more traditional rear-wheel-drive layout were often cited as key advantages. Fuel economy was reasonable for a performance car of this type, averaging around 30 mpg in combined driving. Reliability has generally been good, although preventative maintenance is crucial, particularly regarding oil changes and cooling system checks.
Legacy
The BMW M140i has become a sought-after used car among driving enthusiasts. Its combination of performance, practicality, and relatively affordable price point has made it a popular choice. The B58 engine is known for its durability and tunability, making it a favorite among those who enjoy modifying their cars. The M140i represents a high point in the F20 1 Series lineage and is considered by many to be one of the best hot hatches of its era. Well-maintained examples continue to command strong prices on the used car market, reflecting their enduring appeal.
