The BMW 4 Series Coupe and Convertible share the same fundamental character: a two-door, four-seat layout built around a rear-biased driving experience. What separates them is the roof, and everything that choice implies.
The Coupe is the purist format. Its fixed roof contributes structural rigidity, and its lower curb weight keeps the driving feel sharp and direct. The Convertible opens that structure to the sky, trading a degree of that rigidity for the experience of top-down motoring.
The Coupe is offered with three distinct powertrain families: the 2.0L BMW TwinPower Turbo Inline 4-Cylinder Mild Hybrid in the 430i, the 3.0L BMW M TwinPower Turbo Inline 6-Cylinder Mild Hybrid in the M440i, and the high-output inline-six in the M4 range. The Convertible offers the 430i and M440i powertrains with rear-wheel drive and xDrive available on each.
The Coupe. The BMW 4 Series Coupe is built around a fixed hardtop roofline that runs in a sweeping arc from the A-pillar to the trunk. That continuous structure gives the Coupe its taut, sport-forward silhouette and contributes to structural stiffness at the chassis level. The result is a body style that puts every input from the steering and suspension directly in your hands with minimal flex in between. At 187.9 inches in length and 72.9 inches wide, the Coupe holds a footprint that is assertive without being oversized.
Cargo access differs between the two. The Coupe offers up to 15.5 cu ft of maximum cargo with rear seats folded. The Convertible’s cargo space is shaped by the folded roof mechanism, so shoppers who carry significant cargo regularly should note that difference.
The 2027 BMW 4 Series Coupe spans seven configurations, the Convertible four. Here is how each breaks down by powertrain and drivetrain:
The starting point. 255 hp and 295 lb-ft of torque from the 2.0L BMW TwinPower Turbo Inline 4-Cylinder Mild Hybrid, rear-wheel drive, and the eight-speed automatic transmission. Reaches 60 mph in 5.6 seconds and returns up to 28 city / 36 hwy mpg.
Adds BMW xDrive all-wheel drive to the 430i powertrain, returning 27 city / 34 hwy mpg, with the same 255 hp and 295 lb-ft of torque.
Pairs the 3.0L BMW M TwinPower Turbo Inline 6-Cylinder Mild Hybrid, 386 hp and 398 lb-ft of torque, with rear-wheel drive. Covers 0-60 mph in 4.6 seconds and returns 27 city / 34 hwy mpg.
Adds xDrive all-wheel drive to that 386 hp inline-six. Covers 0-60 mph in 4.2 seconds and returns 26 city / 33 hwy mpg.
Steps into dedicated M Division territory with a high-output version of the S58 inline-six. Confirm M4 Coupe horsepower, torque, and 0-60 figures with the spec team before publishing.
Raises output further within the S58 engine family, adding M-specific chassis tuning and standard Active M Differential. Confirm M4 Competition Coupe horsepower, torque, and 0-60 figures with the spec team before publishing.
Combines M4 Competition output with BMW M xDrive all-wheel drive, the range-topping Coupe configuration. Confirm M4 Competition xDrive Coupe horsepower, torque, and 0-60 figures with the spec team before publishing.
Brings the same 255 hp / 295 lb-ft powertrain to the open-air body style with rear-wheel drive.
Adds xDrive all-wheel drive to the 430i Convertible, a combination that makes the Convertible a genuine four-season vehicle in Michigan’s climate.
Pairs the 386 hp inline-six with the soft-top body and rear-wheel drive for drivers who want maximum powertrain output with open-air character.
Combines 386 hp, 398 lb-ft, and xDrive in the Convertible body, the range-topping open-air configuration in the lineup.
The Coupe’s structural advantage pays off most on roads with varied surfaces. West Michigan’s mix of highway stretches and winding two-lane roads around the lakeshore rewards a chassis that communicates well. The 430i Coupe’s 28 city / 36 hwy mpg rating means the efficiency story holds up on longer drives, not just urban routes.
The availability of xDrive on both the 430i xDrive Convertible and the M440i xDrive Convertible is the detail that changes the Convertible’s practical calculus in Michigan. All-wheel drive with standard Active Blind Spot Detection, Frontal Collision Warning with City Collision Mitigation, and Lane Departure Warning gives the open-air body style a capability profile that is not limited to summer months.
The M440i configurations, in either body style, deliver 386 hp and a 0-60 mph time of 4.2 seconds in xDrive Coupe form, or 4.6 seconds in the M440i RWD Coupe. The M4 Coupe range pushes output higher still, with the M4 Competition xDrive Coupe representing the top of the performance ladder. The Mild Hybrid assist on the 430i and M440i powertrains supplements torque delivery rather than changing the character of the engine, so the inline-six remains the core of that driving experience.
Both body styles come standard with BMW Operating System 8.5 with BMW Intelligent Personal Assistant, wireless Apple CarPlay and Android Auto, and wireless device charging. The My BMW App with Remote Engine Start is available on the 430i and standard on the M440i across both body styles.
The two-door, four-seat format already puts the BMW 4 Series in a narrow segment. Convertibles in this class tend toward soft-top designs at this price point; the 4 Series Convertible follows that pattern and benefits from years of refinement in top mechanism operation and insulation. The Coupe’s swept roofline places it in direct competition with other sport coupes that prioritize proportion over rear headroom.
What distinguishes the BMW 4 Series across both body styles is the breadth of powertrain and drivetrain combinations available within a single nameplate. A buyer can choose the same open-air body style with rear-wheel drive and a four-cylinder, or with all-wheel drive and a six-cylinder. On the Coupe side, that range extends all the way to M4 Competition xDrive. That depth of choice within one model line is not a given in this segment.
The standard safety suite, including Active Blind Spot Detection, Frontal Collision Warning with City Collision Mitigation, Lane Departure Warning, and Active Lane Keeping Assistant, applies across configurations, so neither body style requires stepping up to a different model to access core driver assistance features.
The four-year / 50,000-mile bumper-to-bumper warranty and four-year / 50,000-mile powertrain warranty apply to both body styles, making the ownership foundation consistent regardless of which configuration a buyer selects.
The Coupe and Convertible each make a different case, one built on structural focus, one on open-air freedom, but both are grounded in the same powertrain range and standard technology. Sharpe BMW in Grand Rapids carries both body styles in inventory. Whether the 430i Coupe’s 36 mpg highway efficiency or the M4 Competition xDrive Coupe’s performance capability matches what you are looking for, the next step is seeing both in person. Browse inventory online.
The 2027 BMW 4 Series is available in two body styles: a Coupe and a Convertible. The Coupe spans seven configurations, 430i Coupe, 430i xDrive Coupe, M440i Coupe, M440i xDrive Coupe, M4 Coupe, M4 Competition Coupe, and M4 Competition xDrive Coupe. The Convertible covers four configurations across the 430i and M440i powertrains with rear-wheel drive and xDrive available on each.
The 430i uses a 2.0L BMW TwinPower Turbo Inline 4-Cylinder Mild Hybrid producing 255 hp and 295 lb-ft of torque. The M440i uses a 3.0L BMW M TwinPower Turbo Inline 6-Cylinder Mild Hybrid producing 386 hp and 398 lb-ft of torque. The M440i xDrive Coupe reaches 60 mph in 4.2 seconds; the 430i Coupe does so in 5.6 seconds.
Yes. Both the 430i xDrive Convertible and the M440i xDrive Convertible are available with BMW xDrive all-wheel drive, making the Convertible body style a viable choice in Michigan’s variable weather conditions.
Both the Coupe and Convertible seat four passengers. The two-door layout means rear-seat access requires folding the front seatbacks, but the seating capacity is the same across all configurations.
The 430i Coupe with rear-wheel drive is rated at 28 city / 36 hwy / 30 combined mpg. The 430i xDrive Coupe returns 27 city / 34 hwy. The M440i Coupe returns 27 city / 34 hwy, and the M440i xDrive Coupe returns 26 city / 33 hwy. Convertible-specific EPA figures were not included in the verified specifications for this page.
All 2027 BMW 4 Series configurations include BMW Operating System 8.5 with BMW Intelligent Personal Assistant, wireless Apple CarPlay and Android Auto, wireless device charging, and ambient lighting. The My BMW App with Remote Engine Start is available on the 430i and standard on the M440i.
Standard safety features include Active Blind Spot Detection, Frontal Collision Warning with City Collision Mitigation, Lane Departure Warning, and Active Lane Keeping Assistant. These features are standard across both body styles and all configurations.
The 2027 BMW 4 Series Coupe offers 10.6 cu ft of cargo space behind the second row and up to 15.5 cu ft of maximum cargo with the rear seats folded. Convertible cargo space is shaped by the retractable roof mechanism; shoppers should confirm current figures with Sharpe BMW in Grand Rapids.
