Comparison BMW M4 Convertible (F83) 3.0 (431 Hp) DCT & Mercedes-Benz S-class Long (W221) S 420 CDI (320 Hp)
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| Brand: | BMW | Mercedes-Benz |
| Model: | M4 | S-class |
| Generation: | M4 Convertible (F83) | S-class Long (W221) |
| Engine / modification: | 3.0 (431 Hp) DCT | S 420 CDI (320 Hp) |
| Production start: | 2014 year | 2006 year |
| Production end: | 2020 year | 2009 year |
| Coupe type: | Cabriolet | Sedan |
| Num. of Doors: | 2 | 4 |
| Num. of seats: | 4 | 5 |
| Fuel consumption / economy - urban: | 11.5 l/100 km | 13.0 l/100 km |
| Fuel consumption / economy - extra urban: | 7.1 l/100 km | 7.2 l/100 km |
| Fuel consumption / economy - combined: | 8.7 l/100 km | 9.4 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Diesel |
| Drag coefficient: | 0.34 | |
| Fuel tank volume: | 60 l | 90 l |
| Emission standard: | Euro 6 | EURO IV |
| CO2 emissions: | 203 g/km | |
| Power: | 431 hp | 320 hp |
| Max power in: | 5500-7300 rpm. | 3600 rpm. |
| Maximum speed: | 250 km/h | 250 km/h |
| Acceleration from 0 to 100 km/h: | 4.4 sec | 6.0 sec |
| Torque: | 550 Nm @ 1850-5500 rpm. | 730 Nm/2200 rpm. |
| Model Engine: | S55B30 | |
| Engine position: | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 2979 cm3 | 3996 cm3 |
| Engine oil capacity: | 6.5 l | |
| Coolant: | 13.9 l | |
| Fuel System: | Direct injection | Diesel Commonrail |
| Aspiration / Turbine: | Twin-power turbo | Turbocharging |
| Position of cylinders: | Inline | V engine |
| Valvetrain: | DOHC | |
| Number of cylinders: | 6 | 8 |
| Number of valves per cylinder: | 4 | 4 |
| Compression ratio: | 10.2 | 18 |
| Piston Stroke: | 89.6 mm | 86 mm |
| Cylinder Bore: | 84 mm | 86 mm |
| Wheel Drive: | Rear wheel drive | Rear wheel drive |
| Number of Gears (automatic transmission): | 7 DCT | 7 |
| Length: | 4671 mm | 5206 mm |
| Width: | 1870 mm | 1871 mm |
| Width including mirrors: | 2014 mm | |
| Height: | 1386 mm | 1473 mm |
| Wheelbase: | 2812 mm | 3165 mm |
| Front track: | 1579 mm | 1600 mm |
| Rear (Back) track: | 1603 mm | 1606 mm |
| Ride height(clearance): | 116 mm | |
| Front overhang: | 811 mm | |
| Rear overhang: | 1048 mm | |
| Minimum volume of Luggage (trunk): | 220 l | 560 l |
| Maximum amount of Luggage (trunk): | 370 l | |
| Front suspension: | Double wishbone | Pneumatic elastic element |
| Rear suspension: | Multi-link independent | Pneumatic elastic element |
| Max weight: | 2250 kg | 2580 kg |
| Front brakes: | Ventilated discs | Ventilated discs |
| Rear brakes: | Ventilated discs | Disc |
| Kerb Weight: | 1790 kg | 2000 kg |
| ABS: | yes | yes |
| Steering type: | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Electric Steering | |
| Minimum turning circle (turning diameter): | 12.2 m | |
| Tire size: | 255/40 ZR18 95Y; 275/40 ZR18 99Y | 235/55 R17 |
| Wheel rims size: | 9J x 18; 10J x 18 | 8Jx17 |