What Engine Powers the 2018 BMW M240i: Performance and Precision

The 2018 BMW M240i stands out as a masterclass in sporty luxury, powered by a meticulously engineered engine that balances efficiency and exhilarating performance.

What Engine Does a 2018 BMW M240i Feature?

The 2018 BMW M240i is equipped with a 3.0-liter inline-six (B58) engine, delivering 335 horsepower and 339 lb-ft of torque. This turbocharged, direct-injection powerplant combines smoothness with responsive power delivery, making it ideal for both daily driving and spirited highway cruising. The engine’s design emphasizes precision, pairing naturally with BMW’s advanced 8-speed automatic transmission for seamless acceleration.

Engine Specifications and Performance

With a displacement of 2,998 cc, the B58 inline-six revs up to 6,500 RPM, enabling quick response and a broad power band. Thanks to BMW’s TwinPower Turbo technology and integrated start-stop system, the M240i achieves impressive fuel economy without sacrificing performance. Real-world driving reveals a balanced blend of torque delivery and refined high-RPM character, keeping the cabin quiet and focused on the driving experience.

Why the B58 Inline-Six Stands Out

Unlike many competitors relying on V6 or turbocharged four-cylinders, BMW’s choice of the B58 inline-six delivers a unique combination of smooth power delivery and compact packaging. Its low center of gravity and smooth firing order enhance rear-wheel-drive dynamics, reinforcing the M240i’s reputation as a driver’s car built for both comfort and engagement. The engine’s integration with BMW’s iDrive 7 system also offers intuitive control, enhancing user experience.

The 2018 BMW M240i’s B58 inline-six engine proves that performance and refinement go hand in hand. For those seeking a luxury sedan with spirited driving character and technical excellence, this engine delivers a compelling proposition. If you're exploring premium driver-focused vehicles, understanding the B58’s role in the M240i sets the foundation for appreciating its full potential.

Detailed specs and features for the Used 2018 BMW 2 Series M240i including dimensions, horsepower, engine, capacity, fuel economy, transmission, engine type, cylinders, drivetrain and more. View detailed specs, features and options for the 2018 BMW 2-Series M240i xDrive Coupe at U.S. News & World Report.

View complete technical specifications for 2018 BMW M240i. Includes performance data, fuel economy, dimensions, engine details, and more. Discover key facts, performance ratings, and comparisons in our detailed 2018 BMW M240i review for informed car owners.

BMW is updating its B58 six-cylinder engine for the M240i, M340i, and M440i. Power rises to 386 hp with more torque, while fuel consumption drops. Here's what's new for November 2025.

335.0-hp, 3.0-liter, Straight 6 Cylinder Engine (Gasoline Fuel) $2,250 Starting MSRP $2,250 Starting MSRP $500 Starting MSRP Wondering which trim is right for you? Our 2018 BMW M240 trim. Conclusion: Why the BMW M240i's Engine Stands Out in Its Class The engine in the BMW M240i truly exemplifies what's possible when innovation meets tradition. Its turbocharged inline-six offers a blend of power, smoothness, and technological sophistication that elevates the driving experience of a relatively small sports coupe.

Specs datasheet with technical data and performance data plus an analysis of the direct market competition of BMW M240i Coupe in 2018 the model with 2-door notchback coupe body and Line-6 2998 cm3 / 182.9 cui, 250 kW / 340 PS / 335 hp (ECE) of power, 500 Nm / 369 lb-ft of torque, 8. Explore the BMW M240i engine specs, configuration, oil requirements, and service intervals for optimal performance and maintenance. Hidden engine problems and reliability issues most buyers discover too late.

Whether you opt for the coupe or the cabriolet, the 230i has a 248-horsepower four-cylinder turbo while the M240i gets a 335-horsepower six cylinder engine. Moreover, xDrive all.

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