BMW 4 Series Convertible vs BMW M4 Convertible

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4 Series Convertible compared with M4 Convertible

	BMW4 Series Convertible	BMWM4 Convertible
Overview
Released
Released	March 2021	July 2021
Performance
Powertrain
Powertrain	Petrol, Mild hybrid	Petrol
Power
Power	181–386 bhp	523 bhp (better)
0–62 mph
0–62 mph	4.8–8.2 s	3.7 s (better)
Top speed
Top speed	147–155 mph	155 mph
Engine or motors
Engine or motors	420i: 1,998 cc four-cylinder turbo petrol, 135 kW (184 hp); M440i xDrive: 2,998 cc six-cylinder turbo petrol with 48 V mild hybrid, 288 kW (392 hp); bhp converted from BMW's kW figures	2,993 cc six-cylinder twin-turbo petrol, 390 kW (530 hp); bhp converted from BMW's kW figures
Torque
Torque	300 Nm (420i), 540 Nm (M440i xDrive)	650 Nm
Gearbox
Gearbox	8-speed automatic	8-speed automatic
Drive
Drive	Rear-wheel drive (420i) or all-wheel drive (M440i xDrive)	M xDrive all-wheel drive
Range and charging
Economy (WLTP)
Economy (WLTP)	39.2–41.5 mpg (better)	27.2 mpg
Efficiency
Efficiency	WLTP combined: 40.9–41.5 mpg (420i), 36.7–39.2 mpg (M440i xDrive)	WLTP combined: 26.9–27.2 mpg
CO2 emissions
CO2 emissions	154–158 g/km (420i), 164–175 g/km (M440i xDrive), WLTP combined	237–239 g/km, WLTP combined
Practicality
Body
Body	Convertible	Convertible
Seats
Seats	4	4
Boot
Boot	385 litres	385 litres
Length
Length	4,768 mm	4,801 mm
Width
Width	1,852 mm	1,887 mm
Boot
Boot	385 litres	385 litres with roof closed, 300 litres with roof open
Towing
Towing	Up to 1,600 kg braked (420i), 1,800 kg (M440i xDrive)	–
Size
Size	4,768 mm long (4,770 mm M440i), 1,852 mm wide (2,081 mm with mirrors), 1,384 mm high (1,394 mm M440i); 2,851 mm wheelbase; EC unladen weight including a 75 kg driver is 1,765 kg (420i), 2,000 kg (current M440i xDrive)	4,801 mm long, 1,887 mm wide (2,081 mm with mirrors), 1,399 mm high; 2,857 mm wheelbase; EC unladen weight including a 75 kg driver is 2,010 kg