2027 BMW 4 SERIES PERFORMANCE AND ENGINE OPTIONS: BMW 430i VS. BMW M440i GUIDE.
BMW 4 Series for 2027 is offered with two BMW TwinPower Turbo engines, spanning 255 hp to 386 hp across Coupe, Convertible, and Gran Coupe body styles. BMW 430i uses a 2.0-liter BMW TwinPower Turbo inline four-cylinder; BMW M440i steps up to a 3.0-liter BMW M TwinPower Turbo inline six-cylinder with BMW M Performance output. This page covers every powertrain, drivetrain pairing, and performance figure to help you choose the right build from Grayson BMW inventory.
PERFORMANCE OVERVIEW: WHAT MAKES THE BMW 4 SERIES ENGINE LINEUP STAND OUT.
BMW 4 Series powertrain lineup for 2027 is built around one principle: matching the right engine to the driver's intent. Two distinct BMW TwinPower Turbo engines cover the range from confident daily performance to BMW M Performance output. BMW 430i delivers 255 hp and 295 lb-ft of torque, drawing on a 2.0-liter inline four-cylinder paired to an eight-speed automatic transmission. BMW M440i raises the ceiling substantially, producing 386 hp and 398 lb-ft of torque from its 3.0-liter BMW M TwinPower Turbo inline six-cylinder engine.
Both engines benefit from BMW TwinPower Turbo technology, which combines a twin-scroll turbocharger with High Precision Injection and VALVETRONIC variable valve control. That combination keeps torque available across a wide rpm band. BMW 430i delivers its peak torque between 1,600 and 4,500 rpm. BMW M440i holds its 398 lb-ft between 1,900 and 4,800 rpm. In practical terms, both engines pull strongly from low engine speeds, which matters on on-ramp merges and Tennessee mountain grades alike.
The eight-speed automatic transmission is shared across both powertrains. BMW 430i and BMW M440i use rear-wheel drive, while BMW 430i xDrive and BMW M440i xDrive models use BMW xDrive all-wheel drive. Drivers in Knoxville who navigate seasonal weather will find xDrive adds meaningful traction confidence without softening the driving character BMW 4 Series is known for.
2027 BMW 4 Series full specifications
HOW THE ENGINES WORK.
BMW 430i: 2.0-LITER BMW TWINPOWER TURBO INLINE FOUR-CYLINDER.
BMW 430i's 1,998cc four-cylinder displaces 2.0 liters and produces 255 hp from 4,700 to 6,500 rpm. The engine uses a twin-scroll turbocharger to reduce lag by separating exhaust pulses from each cylinder pair. High Precision direct injection precisely meters fuel delivery, and VALVETRONIC continuously varies valve lift to optimize breathing at every load point. The result is an engine that is responsive without feeling strained.
In BMW 430i Coupe with rear-wheel drive, the 0-60 mph time is 5.6 seconds. Paired with xDrive all-wheel drive in BMW 430i xDrive Coupe, that figure drops to 5.4 seconds. The EPA rates the rear-wheel-drive BMW 430i Coupe at 28 city / 36 highway mpg.
BMW M440i: 3.0-Liter BMW M TwinPower Turbo Inline Six-Cylinder.
BMW M440i's engine displaces 2,998cc. Its 386 hp arrives between 5,200 and 6,250 rpm, and peak torque of 398 lb-ft is on tap from 1,900 to 4,800 rpm. The six-cylinder layout adds a naturally smoother power delivery curve compared to the four-cylinder, which is perceptible both in character at cruise and in the sound at higher revs. M Sport Differential tuning and Variable Sport Steering with Servotronic further define the BMW M440i driving experience.
BMW M440i Coupe covers 0-60 mph in 4.6 seconds in rear-wheel-drive form. BMW M440i xDrive Coupe reaches 60 mph in 4.2 seconds. In Convertible form, BMW M440i xDrive Convertible manages 0-60 mph in 4.6 seconds. All models share the same eight-speed automatic transmission with responsive downshift mapping.
ACROSS THE MODELS: WHICH ENGINE COMES IN WHICH BODY.
BMW 4 Series for 2027 is available in three body styles, each offered with both powertrains. The configurations below map each body style to its rated output and 0-60 mph time.
| Body Style | Model | Drivetrain | Horsepower | 0-60 mph |
|---|---|---|---|---|
| Coupe | BMW 430i Coupe | RWD | 255 hp | 5.6 seconds |
| Coupe | BMW 430i xDrive Coupe | AWD | 255 hp | 5.4 seconds |
| Coupe | BMW M440i Coupe | RWD | 386 hp | 4.6 seconds |
| Coupe | BMW M440i xDrive Coupe | AWD | 386 hp | 4.2 seconds |
| Convertible | BMW 430i Convertible | RWD | 255 hp | 6.0 seconds |
| Convertible | BMW 430i xDrive Convertible | AWD | 255 hp | 5.9 seconds |
| Convertible | BMW M440i Convertible | RWD | 386 hp | 5.0 seconds |
| Convertible | BMW M440i xDrive Convertible | AWD | 386 hp | 4.6 seconds |
| Gran Coupe | BMW 430i Gran Coupe | RWD | 255 hp | 5.8 seconds |
| Gran Coupe | BMW 430i xDrive Gran Coupe | AWD | 255 hp | 5.7 seconds |
| Gran Coupe | BMW M440i Gran Coupe | RWD | 386 hp | 4.6 seconds |
| Gran Coupe | BMW M440i xDrive Gran Coupe | AWD | 386 hp | 4.3 seconds |
BMW M440i also brings additional BMW M-tuned chassis hardware. Standard equipment on BMW M440i configurations includes the M Sport Differential for improved rear traction distribution on winding roads, and Variable Sport Steering with Servotronic for more precise road feedback. BMW M440i exterior is differentiated by the kidney grille with high-gloss black frame, horizontal bars, and M badge, as well as standard rear lights with high-precision laser technology. On BMW 430i models, laser rear lights are available rather than standard.
2027 BMW 4 Series model comparison
The Parking Assistance Package, Premium Package with Remote Engine Start, and Driving Assistant Professional are available options across both engine families. Remote Engine Start is available on BMW 430i configurations and standard on BMW M440i configurations through the My BMW App. Drivers in Knoxville and surrounding areas who want hands-free assist at highway speeds up to 40 mph can add the Driving Assistant Professional Package, which includes Traffic Jam Assistant, Lane Change Assistant, and Distance Control with Steering Assistant on both BMW 430i and BMW M440i lineups.
REAL-WORLD BENEFIT: WHAT THESE POWERTRAINS DELIVER EVERY DAY.
BMW 430i is the more versatile daily powertrain. Its 28 city / 36 highway mpg rating in rear-wheel-drive Coupe form means owners covering regular Knoxville commutes or I-40 highway miles will spend less time refueling without sacrificing the core BMW driving character. Torque arrives early, the eight-speed transmission shifts cleanly in automatic mode, and the vehicle responds predictably in everyday driving.
BMW M440i makes a compelling case for drivers who use their BMW 4 Series more spiritedly on weekends. The additional 131 hp over BMW 430i is immediately perceptible in how the vehicle builds through the mid-range, and the six-cylinder's 398 lb-ft of torque pulls with authority that the four-cylinder cannot match. For those heading out on Tennessee's curvier rural stretches or through Smoky Mountain-adjacent roads, the M Sport Differential and Variable Sport Steering work in combination with the engine's output to keep the vehicle planted and responsive through direction changes.
BMW 4 Series Coupe and Convertible seat four, while BMW 4 Series Gran Coupe seats up to five. Body style choice matters more for lifestyle fit: the Coupe prioritizes visual presence and the firmest body rigidity, the Convertible's tailored soft top operates in approximately ten seconds at speeds up to 30 mph, and the Gran Coupe adds four-door access while retaining a coupe-inspired profile.
HOW THE BMW 4 SERIES POWERTRAIN COMPARES.
BMW 4 Series occupies a segment that includes the Audi A5, Mercedes-Benz C-Class Coupe, and Lexus RC. Without asserting competitor specs, BMW 4 Series offers the BMW M TwinPower Turbo inline six-cylinder at the BMW M440i level, paired with M Sport Differential and Variable Sport Steering on the applicable model. That means buyers get BMW M Performance chassis hardware alongside the more potent engine without stepping up to a BMW M model.
The BMW xDrive all-wheel drive system available on BMW 430i xDrive and BMW M440i xDrive configurations is BMW's established multi-plate clutch system that operates proactively, sending power where traction is optimal before slip occurs. Competitors in this segment offer all-wheel drive as well, but the BMW M440i xDrive pairing is distinctive in combining BMW M Performance powertrain components with all-weather traction capability in a single configuration. For Knoxville buyers who want one vehicle to handle both back-road performance driving and occasional winter conditions, BMW M440i xDrive represents a focused option.
BMW 430i and BMW M440i models are covered by the BMW New Vehicle Limited Warranty for four years or 50,000 miles.
BUILD YOUR BMW 4 SERIES AT GRAYSON BMW IN KNOXVILLE.
Grayson BMW carries BMW 4 Series for 2027 in BMW 430i and BMW M440i configurations, with Coupe, Convertible, and Gran Coupe body styles, and rear-wheel drive or BMW xDrive all-wheel drive. Whether you want the efficiency of the four-cylinder or the BMW M Performance output of the inline six, the right build is available at our Knoxville location. Use the links below to view current inventory or get started on a test drive.
FREQUENTLY ASKED QUESTIONS.
What engines are available in the 2027 BMW 4 Series?
Two engines are available. BMW 430i uses a 2.0-liter BMW TwinPower Turbo inline four-cylinder producing 255 hp and 295 lb-ft of torque. BMW M440i uses a 3.0-liter BMW M TwinPower Turbo inline six-cylinder producing 386 hp and 398 lb-ft of torque.
What is the difference between the BMW 430i and BMW M440i engines?
BMW 430i delivers 255 hp from a 2.0-liter four-cylinder. BMW M440i delivers 386 hp from a 3.0-liter BMW M TwinPower Turbo inline six-cylinder. BMW M440i also adds BMW M-specific chassis hardware including the M Sport Differential and Variable Sport Steering with Servotronic, which BMW 430i does not include as standard.
What is the acceleration performance of the 2027 BMW 430i Coupe?
BMW 430i Coupe with rear-wheel drive reaches 60 mph in 5.6 seconds. BMW 430i xDrive Coupe with all-wheel drive reaches 60 mph in 5.4 seconds.
What is the acceleration performance of the 2027 BMW M440i xDrive Coupe?
BMW M440i xDrive Coupe reaches 60 mph in 4.2 seconds, which is the strongest published acceleration figure in the standard BMW 4 Series Coupe lineup.
Is BMW xDrive all-wheel drive available on both BMW 430i and BMW M440i?
Yes. BMW xDrive all-wheel drive is available on BMW 430i xDrive Coupe, BMW 430i xDrive Convertible, BMW 430i xDrive Gran Coupe, BMW M440i xDrive Coupe, BMW M440i xDrive Convertible, and BMW M440i xDrive Gran Coupe. BMW 430i and BMW M440i models use rear-wheel drive, while the corresponding xDrive models use BMW xDrive all-wheel drive.
What is the fuel economy of the 2027 BMW 430i Coupe?
BMW 430i Coupe with rear-wheel drive is rated at 28 city / 36 highway mpg by the EPA.
Does the 2027 BMW 4 Series use a manual transmission?
No. All standard BMW 430i and BMW M440i models use an eight-speed automatic transmission. A six-speed manual transmission is available on BMW M4 Coupe, which is a separate BMW M model.
Can I get Remote Engine Start on the 2027 BMW 4 Series?
Remote Engine Start is available on BMW 430i configurations through the optional Premium Package and accessible via the My BMW App. It is standard on BMW M440i configurations.