BMW
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BMW
Introduced for the 2021 model year as the open-top member of the second-generation 4 Series, the G23 BMW M440i xDrive Convertible swaps the previous generation's folding hardtop for a lighter, more compact fabric roof. Its B58 3.0-liter turbocharged inline-six is paired with a 48-volt mild-hybrid system whose belt-driven starter-generator adds an 11-hp electric boost; for the 2025 model year Car and Driver rates the combination at 386 horsepower and 398 lb-ft of torque. Power reaches all four wheels through a ZF eight-speed Steptronic automatic and standard xDrive, and top speed is electronically limited to 155 mph. It is positioned as a refined four-seat grand-touring cabriolet rather than an outright sports car, leaving the hardcore performance role to the M4 Convertible.
Each figure carries an evidence mark and a text label; expand a value for its full provenance — citation, verification, test conditions, and any alternate figures.
Originally reported as 4.9 s; stored canonically.
BMW — The all-new BMW 4 Series Convertible.Manufacturer
BMW global PressClub exact 0-100 km/h claim for the M440i xDrive Convertible; marked medium because the seed variant is US-market and the citation is global-market press material.
The headline numbers for the 2025 BMW M440i xDrive Convertible, answered straight from its sourced record.
Cars in the same class at a comparable price and performance — each figure sourced. Open a head-to-head to weigh the numbers side by side.
Originally reported as 4.6 s; stored canonically.
BMWUSA current 4 Series Convertible page lists the G23 M440i xDrive Convertible at 0-60 mph in 4.6 s; seeded as same-generation support for the 2025 variant.
Originally reported as 187.7 in; stored canonically.
Overall length 4,768 mm (187.7 in), shared across the G22/G23 body.
Originally reported as 112.2 in; stored canonically.
Wheelbase 2,851 mm (112.2 in), shared across the G22/G23 body.
Six cylinders, inline B58 engine. EPA vehicle record lists the M440i xDrive Convertible as a 6-cylinder, 3.0 L, turbocharged engine.
Originally reported as 3 L; stored canonically.
3.0-liter BMW B58 turbocharged inline-six (US engine code B58B30O1).
Originally reported as 627.644184 km; stored canonically.
Calculated from Fuel tank capacity · Fuel economy (city).
Originally reported as 702.961447 km; stored canonically.
Calculated from Fuel tank capacity · Fuel economy (combined).
Electronically limited top speed of 155 mph (250 km/h), per the manufacturer claim reported in the Car and Driver specifications.
2+2 seating; four occupants. EPA classifies the car as a Subcompact two-door.
Originally reported as 74850 $; stored canonically.
MSRP listed on the EPA vehicle record for the 2025 BMW M440i xDrive Convertible (MSRP data on fueleconomy.gov is provided by Edmunds).
Backed by 6 source documents. Expand any value for its full provenance — citation, verification, test conditions, and alternate figures.
Spot a missing or incorrect figure? Add a sourced value — an editor verifies every submission before it appears.
Add dataOriginally reported as 72.9 in; stored canonically.
Width 1,852 mm (72.9 in), excluding mirrors.
Inline (straight) six-cylinder, BMW B58.
Front-mounted, longitudinally installed engine (CLAR platform, front-engine / all-wheel-drive layout).
Single twin-scroll turbocharger on the B58 inline-six; EPA record explicitly lists "Turbocharger".
Eight forward gears (ZF 8HP Steptronic).
Current 2025 US rating for the M440i: the B58 3.0L turbo inline-six peaks at 386 hp, of which 11 hp is contributed by the 48-volt starter-generator. (Pre-LCI Wikipedia spec table listed 285 kW / 382 hp for the US engine; the facelifted 2025 figure is 386 hp.)
Current 2025 US rating for the M440i's B58 turbo inline-six: 398 lb-ft. (Pre-LCI Wikipedia spec table listed 500 N⋅m / 369 lb-ft.)
ZF 8HP 8-speed Steptronic torque-converter automatic, the only gearbox offered on the M440i.
Originally reported as 803.384498 km; stored canonically.
Calculated from Fuel tank capacity · Fuel economy (highway).
Originally reported as 25 mpg; stored canonically.
EPA city rating for the 2025 BMW M440i xDrive Convertible.
Originally reported as 28 mpg; stored canonically.
EPA combined rating for the 2025 BMW M440i xDrive Convertible (3.0 L turbo I6, 8-speed auto, AWD, premium gasoline).
Originally reported as 32 mpg; stored canonically.
EPA highway rating for the 2025 BMW M440i xDrive Convertible.
Fuel tank capacity 15.6 US gallons, per the EPA vehicle record (tank-size data on fueleconomy.gov is provided by Edmunds).
