BMW M4 Convertible vs Mercedes-Benz Mercedes-AMG SL Roadster

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M4 Convertible compared with Mercedes-AMG SL Roadster

	BMWM4 Convertible	Mercedes-BenzMercedes-AMG SL Roadster
Overview
Released
Released	July 2021	2022
Performance
Powertrain
Powertrain	Petrol	Mild hybrid, Petrol, Plug-in hybrid
Power
Power	523 bhp	416–805 bhp (better)
0–62 mph
0–62 mph	3.7 s	2.9–4.7 s (better)
Top speed
Top speed	155 mph	173–197 mph (better)
Engine or motors
Engine or motors	2,993 cc six-cylinder twin-turbo petrol, 390 kW (530 hp); bhp converted from BMW's kW figures	SL 43: 1,991 cc four-cylinder turbo petrol, 310 kW (421 hp) plus 10 kW mild-hybrid drive; SL 55 and SL 63: 3,982 cc V8, 350 or 430 kW (476 or 585 hp); SL 63 S E PERFORMANCE: 450 kW V8 plus 150 kW electric motor, 600 kW (816 hp) system output; bhp converted from Mercedes' kW figures
Torque
Torque	650 Nm	500 Nm (SL 43), 700 Nm (SL 55), 800 Nm (SL 63), 850 Nm plus 320 Nm electric (SL 63 S E PERFORMANCE)
Gearbox
Gearbox	8-speed automatic	AMG SPEEDSHIFT MCT 9-speed
Drive
Drive	M xDrive all-wheel drive	Rear-wheel drive (SL 43); 4MATIC+ all-wheel drive (SL 55, SL 63 and SL 63 S E PERFORMANCE)
Range and charging
Zero-emission range (WLTP)
Zero-emission range (WLTP)	–	7 miles
Battery
Battery	–	4.84 kWh
Economy (WLTP)
Economy (WLTP)	27.2 mpg	21.7–31.4 mpg (better)
Range detail
Range detail	–	SL 63 S E PERFORMANCE WLTP electric range 7 miles
Charging
Charging	–	SL 63 S E PERFORMANCE: 4.84 kWh lithium-ion battery; 3.7 kW AC, 25–100% in 1 hour 30 minutes
Efficiency
Efficiency	WLTP combined: 26.9–27.2 mpg	WLTP combined: 31.4 mpg (SL 43, Mercedes UK technical data; 29.7–31.4 mpg in the brochure), 21.1–21.7 mpg (SL 55, SL 63), 28.3 mpg and 336 Wh/km (SL 63 S E PERFORMANCE)
CO2 emissions
CO2 emissions	237–239 g/km, WLTP combined	206 g/km (SL 43), 305 g/km (SL 55, SL 63), 228 g/km (SL 63 S E PERFORMANCE)
Practicality
Body
Body	Convertible	Convertible
Seats
Seats	4	4
Boot
Boot	385 litres (better)	213 litres
Length
Length	4,801 mm	4,700 mm
Width
Width	1,887 mm	1,915 mm
Weight
Weight	–	From 1,837 kg
Boot
Boot	385 litres with roof closed, 300 litres with roof open	213 litres; 110 litres (SL 63 S E PERFORMANCE)
Size
Size	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	4,700 mm long, 1,915 mm wide without mirrors (2,100 mm with), 1,359 mm high; 13.05 m turning circle (12.35 m V8 models); kerb weight 1,837 kg (SL 43, Mercedes UK technical data) to 2,199–2,215 kg (SL 63 S E PERFORMANCE, brochure, including a 75 kg driver); 70-litre fuel tank