Bmw 340I Specs
As we navigate through 2026, the automotive landscape continues to witness the enduring legacy of the BMW 3 Series, with the BMW 340i standing as the quintessential bridge between everyday luxury and track-ready performance. Known for its perfect 50:50 weight distribution and the legendary smooth power delivery of its inline-six engine, the 340i—often referred to in its current iteration as the M340i—represents a masterclass in German engineering. For driving enthusiasts and pragmatic professionals alike, understanding the comprehensive Bmw 340I Specs is essential for appreciating why this model remains the benchmark in the executive compact sedan segment. Whether you are interested in its electrified powertrain, its cutting-edge digital interior, or its refined chassis dynamics, this guide provides a deep dive into the technical heart of the ultimate driving machine.
Powertrain and Performance Engineering
At the core of the Bmw 340I Specs is the venerable B58 3.0-liter BMW M TwinPower Turbo inline 6-cylinder gasoline engine. In the 2026 model year context, this engine has been further refined to balance raw power with increasing environmental scrutiny. The integration of a 48-volt mild-hybrid system is a standard feature, providing an additional 12 horsepower boost that aids in smoothing out the auto start-stop function and provides an electric "eBoost" during high-load acceleration. This system allows the 340i to deliver a staggering 382 to 392 horsepower depending on specific regional tuning, with torque figures reaching up to 369 lb-ft at just 1,800 rpm.
The transmission remains the industry-standard 8-speed Steptronic Sport automatic, praised for its lightning-fast shift times and intuitive mapping. Drivers can choose between traditional Rear-Wheel Drive (RWD) for a classic sports car feel or the intelligent xDrive All-Wheel Drive (AWD) system, which can propel the sedan from 0 to 60 mph in a blistering 3.7 to 4.4 seconds. The performance is further supported by the M Sport differential and M Sport brakes, which come standard on the 340i trim, ensuring that the vehicle can stop as effectively as it accelerates.
Interior Dimensions and Luxury Features
Inside the cabin, the Bmw 340I Specs reveal a cockpit that has successfully transitioned into the digital age without sacrificing the driver-centric ergonomics for which BMW is famous. The focal point of the interior is the BMW Curved Display, which seamlessly integrates a 12.3-inch Digital Instrument Cluster with a 14.9-inch Central Information Display. Running on the latest BMW Operating System, this setup offers wireless Apple CarPlay, Android Auto, and sophisticated voice command functionality through the Intelligent Personal Assistant.
In terms of physical space, the 340i provides a comfortable environment for up to five adults. Front passengers benefit from 38.7 inches of headroom and 42.0 inches of legroom, while rear passengers enjoy 37.6 inches of headroom and 35.2 inches of legroom. The trunk is one of the most generous in the segment, offering 17 cubic feet of cargo capacity, making it a viable option for weekend getaways and grocery runs alike. Standard luxury amenities include multi-zone automatic climate control, a power moonroof, and SensaTec or optional Vernasca leather upholstery with M-specific contrast stitching.
| Feature Category | Specification Detail |
|---|---|
| Engine Type | 3.0L Turbocharged Inline-6 with 48V Mild Hybrid |
| Horsepower | 382 - 392 hp @ 5,800 rpm |
| 0-60 mph Time | 3.7 seconds (xDrive) / 4.4 seconds (RWD) |
| Cargo Volume | 17.0 Cubic Feet |
Safety Technology and Driver Assistance
The 2026 Bmw 340I Specs prioritize safety through a comprehensive suite of active and passive systems. BMW's "Active Guard" is standard, featuring Frontal Collision Warning, Automatic City Braking, and Lane Departure Warning. For those seeking a more autonomous experience, the Driving Assistance Professional Package is available, offering Extended Traffic Jam Assistant for limited-access highways and Active Cruise Control with Stop & Go functionality.
The chassis itself is a marvel of safety engineering, utilizing a mix of high-strength steel and aluminum to create a rigid safety cell while keeping the curb weight around 3,849 lbs for the RWD model. Standard LED headlights with cornering lights ensure maximum visibility, while the optional Icon Adaptive LED Headlights with Laserlight technology provide even greater range and clarity for nighttime driving. The inclusion of a 360-degree Surround View camera and Parking Assistant Plus makes navigating tight urban spaces in a premium sedan easier than ever.
Frequently Asked Questions (FAQ)
Is the BMW 340i fuel efficient?
Despite its high-performance nature, the Bmw 340I Specs include impressive fuel economy figures for its class. Thanks to the 48V mild-hybrid system, the RWD model achieves an EPA-estimated 23 mpg city and 32 mpg highway, while the xDrive version is slightly lower but still competitive at approximately 26 mpg combined.
What is the difference between the 330i and the 340i?
The primary difference lies in the engine and standard performance equipment. While the 330i uses a 2.0-liter turbocharged 4-cylinder engine, the 340i features the much more powerful 3.0-liter 6-cylinder. Additionally, the 340i comes standard with M Sport suspension, brakes, and differential, which are optional on the 330i.
Does the 2026 BMW 340i have a manual transmission option?
As of the 2026 model year, the BMW 340i is exclusively available with the 8-speed Steptronic Sport automatic transmission. BMW has phased out manual transmissions in the standard 3 Series lineup to optimize the integration of modern driver assistance systems and the mild-hybrid powertrain.
Conclusion
In summary, the Bmw 340I Specs paint a picture of a vehicle that refuses to compromise. By merging the visceral thrill of a 392-horsepower inline-six engine with the sophisticated digital comforts of a flagship luxury sedan, BMW has ensured that the 340i remains the gold standard of the executive compact class. It offers the speed of a sports car, the technology of a modern smartphone, and the practicality of a daily commuter. For those who demand the "Ultimate Driving Machine," the 2026 BMW 340i continues to deliver on that promise with precision, power, and unparalleled German refinement.