The all-new BMW 4 Series Convertible

The standout element of the models in the new BMW 4 Series range is the carefully judged enhancement of their sporting abilities. And now, this can also be combined with the pleasure of open-top motoring. With its sensational styling, brand new roof design, diverse line-up of engines, top-class chassis technology and innovative equipment features, the new BMW 4 Series Convertible packages driving pleasure in a particularly exclusive form.

A design conceived in the brand's current styling language that radiates sporting elegance, a new type of roof design and performance that has stepped up significantly compared to its predecessor make the latest generation of the open-top four-seater a highly compelling proposition. The design, vehicle concept and driving dynamics provide greater differentiation from the BMW 3 Series Sedan than at any time in the 35 years that BMW convertibles have graced the midsize class. 

The range now peaks with an extremely sporty BMW M440i xDrive Convertible flagship model powered by a 275 kW/374 hp six-cylinder in-line petrol engine. The launch line-up also comprises two four-cylinder petrol units and a four-cylinder diesel, with two straight-six diesel engines set to follow later in 2021.

Standalone body design has dynamically stretched proportions and a low-to-the-road silhouette. The expressive front end brings together tradition-rich and modern styling features. Prominent, upright BMW kidney grille references legendary sports cars from the brand's past and signals the high cooling air requirement of the powertrain technology. Extremely slim LED headlights are standard, BMW Laserlight optional.

Significantly enhanced performance capabilities resulting from an extremely stiff body structure with reinforced side skirts, additional convertible-specific bracing and a new aluminium sheer panel in the front end. Low centre of gravity, perfectly balanced 50:50 weight distribution. Optimised aerodynamics, wider tracks than on the outgoing model (+28 mm at the front and +18 mm at the rear).

Optimised functionality for both everyday journeys and longer distances. Variable soft-top compartment allows luggage capacity to be increased from 300 litres (80 l more than predecessor) with the roof down to 385 litres (15 l more) when closed. Storage package, folding rear backrest and through-loading facility all standard.

M Sport model offered as an alternative to standard specification. Also available: M Sport package Pro including 19-inch M light-alloy wheels and a sporty engine soundtrack in the cabin. M Carbon exterior package and M Performance Parts available from the launch of the new BMW 4 Series Convertible.

Model variants

BMW 420i Convertible
Four-cylinder in-line petrol engine, eight-speed Steptronic transmission
Capacity: 1,998 cc, output: 135 kW/184 hp at 5,000 - 6,500 rpm
max. torque: 300 Nm (221 lb-ft) at 1,350 - 4,000 rpm
Acceleration [0 - 100 km/h (62 mph)]: 8.2 seconds
Top speed: 236 km/h (147 mph)
Fuel consumption, combined: 6.1 - 5.7 l/100 km (46.3 - 49.6 mpg imp)
CO2 emissions, combined: 140 - 131 g/km, exhaust standard: Euro 6d

BMW 430i Convertible
Four-cylinder in-line petrol engine, eight-speed Steptronic transmission
Capacity: 1,998 cc, output: 190 kW/258 hp at 5,000 - 6,500 rpm
max. torque: 400 Nm (295 lb-ft) at 1,550 - 4,400 rpm
Acceleration [0 - 100 km/h (62 mph)]: 6.2 seconds
Top speed: 250 km/h (155 mph)
Fuel consumption, combined: 6.4 - 6.0 l/100 km (44.1 - 47.1 mpg imp)
CO2 emissions, combined: 147 - 138 g/km, exhaust standard: Euro 6d

BMW M440i xDrive Convertible
Six-cylinder in-line petrol engine, 48V mild hybrid technology (8 kW/11 hp), eight-speed Steptronic Sport transmission, BMW xDrive
Capacity: 2,998 cc, output: 275 kW/374 hp at 5,500 - 6,500 rpm
max. torque: 500 Nm (369 lb-ft) at 1,900 - 5,000 rpm
Acceleration [0 - 100 km/h (62 mph)]: 4.9 seconds
Top speed: 250 km/h (155 mph)
Fuel consumption, combined: 7.4 - 6.9 l/100 km (38.2 - 40.9 mpg imp)
CO2 emissions, combined: 169 - 159 g/km, exhaust standard: Euro 6d

BMW 420d Convertible
Four-cylinder in-line diesel engine, 48V mild hybrid technology (8 kW/11 hp), eight-speed Steptronic transmission
Capacity: 1,995 cc, output: 140 kW/190 hp at 4,000 rpm
max. torque: 400 Nm (295 lb-ft) at 1,750 - 2,500 rpm
Acceleration [0 - 100 km/h (62 mph)]: 7.6 seconds
Top speed: 236 km/h (147 mph)
Fuel consumption, combined: 4.5 - 4.2 l/100 km (62.8 - 67.3 mpg imp)
CO2 emissions, combined: 119 - 111 g/km, exhaust standard: Euro 6d

BMW 430d Convertible (est. available from July 2021)
Six-cylinder in-line diesel engine, 48V mild hybrid technology (8 kW/11 hp), eight-speed Steptronic transmission
Capacity: 2,993 cc, output: 210 kW/286 hp at 4,000 rpm
max. torque: 650 Nm (479 lb-ft) at 1,500 - 2,500 rpm
Acceleration [0 - 100 km/h (62 mph)]: 5.9 seconds
Top speed: 250 km/h (155 mph)
Fuel consumption, combined: 5.6 l/100 km (50.4 mpg imp)
CO2 emissions, combined: 147 g/km, exhaust standard: Euro 6d

BMW M440d xDrive Convertible (est. available from November 2021)
Six-cylinder in-line diesel engine, 48V mild hybrid technology (8 kW/11 hp), eight-speed Steptronic Sport transmission, BMW xDrive
Capacity: 2,993 cc, output: 250 kW/340 hp at 4,400 rpm
max. torque: 700 Nm (516 lb-ft) at 1,750 - 2,250 rpm
Acceleration [0 - 100 km/h (62 mph)]: 5.1 seconds
Top speed: 250 km/h (155 mph)
Fuel consumption, combined: 6.3 l/100 km (44.8 mpg imp)
CO2 emissions, combined: 165 g/km, exhaust standard: Euro 6d

All figures relating to performance, fuel/electric power consumption and emissions are provisional. The worldwide launch will commence in March 2021.