Comparison BMW Z4 (G29) 20i (197 Hp) sDrive Steptronic & Mercedes-Benz W128 Cabriolet 220 SE (120 Hp) & Mercedes-Benz S-class Long (W221, facelift 2009) S 350 (272 Hp) G-TRONIC
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| Brand: | BMW | Mercedes-Benz | Mercedes-Benz |
| Model: | Z4 | Ponton | S-class |
| Generation: | Z4 (G29) | W128 Cabriolet | S-class Long (W221, facelift 2009) |
| Engine / modification: | 20i (197 Hp) sDrive Steptronic | 220 SE (120 Hp) | S 350 (272 Hp) G-TRONIC |
| Production start: | 2018 year | 1959 year | 2009 year |
| Production end: | 1960 year | 2011 year | |
| Coupe type: | Cabriolet | Cabriolet | Sedan |
| Num. of Doors: | 2 | 2 | 4 |
| Num. of seats: | 2 | 5 | 5 |
| Fuel consumption / economy - urban: | 7.3-7.4 l/100 km | 14.6-14.8 l/100 km | |
| Fuel consumption / economy - extra urban: | 5.0-5.4 l/100 km | 7.4-7.7 l/100 km | |
| Fuel consumption / economy - combined: | 6.0-6.1 l/100 km | 10.7 l/100 km | 10-10.2 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.29 | ||
| Fuel tank volume: | 52 l | 62 l | 90 l |
| Emission standard: | Euro 6 d | ||
| CO2 emissions: | 137-139 g/km | 234-237 g/km | |
| Power: | 197 hp | 120 hp | 272 hp |
| Max power in: | 4500-6500 rpm. | 4800 rpm. | 6000 rpm. |
| Maximum speed: | 226 km/h | 165 km/h | 250 km/h |
| Acceleration from 0 to 100 km/h: | 6.6 sec | 15 sec | 7.3 sec |
| Torque: | 320 Nm @ 1450-4200 rpm. | 189 Nm @ 3900 rpm. | 350 Nm @ 2400-5000 rpm. |
| Model Engine: | B48B20 | M 127 III / 127.983 | |
| Engine position: | Front, longitudinal | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 1998 cm3 | 2195 cm3 | 3498 cm3 |
| Engine oil capacity: | 5.25 l | ||
| Fuel System: | Direct injection | Multi-point injection | |
| Aspiration / Turbine: | Twin-power turbo | ||
| Position of cylinders: | Inline | Inline | V engine |
| Valvetrain: | SOHC | ||
| Number of cylinders: | 4 | 6 | 6 |
| Number of valves per cylinder: | 4 | 2 | |
| Compression ratio: | 10.2 | 8.7 | 10.7 |
| Piston Stroke: | 94.6 mm | 72.8 mm | |
| Cylinder Bore: | 82 mm | 80.01 mm | |
| Wheel Drive: | Rear wheel drive | Rear wheel drive | Rear wheel drive |
| Number of Gears (automatic transmission): | 8 Steptronic | 7G-TRONIC | |
| Number of Gears (manual transmission): | 4 | ||
| Length: | 4324 mm | 4700 mm | 5226 mm |
| Width: | 1864 mm | 1790 mm | 1871 mm |
| Width including mirrors: | 2024 mm | 2120 mm | |
| Height: | 1304 mm | 1530 mm | 1479 mm |
| Wheelbase: | 2470 mm | 2700 mm | 3165 mm |
| Front track: | 1609 mm | 1430 mm | 1600 mm |
| Rear (Back) track: | 1616 mm | 1470 mm | 1606 mm |
| Ride height(clearance): | 117 mm | ||
| Front overhang: | 907 mm | 888 mm | |
| Rear overhang: | 947 mm | 1173 mm | |
| Minimum volume of Luggage (trunk): | 281 l | 560 l | |
| Front suspension: | Double wishbone | ||
| Rear suspension: | Multi-link independent | ||
| Max weight: | 1740 kg | 1810 kg | 2535 kg |
| Front brakes: | Ventilated discs | Drum | Disc |
| Rear brakes: | Ventilated discs | Drum | Disc |
| Kerb Weight: | 1420 kg | 1410 kg | 1880 kg |
| ABS: | yes | yes | |
| Steering type: | Steering rack and pinion | Cone worm with recirculation balls | Steering rack and pinion |
| Power steering: | Electric Steering | ||
| Minimum turning circle (turning diameter): | 11.0 m | 12.2 m | |
| Tire size: | Front wheel tires: 225/50 R17 | 235/55 R17 | |
| Wheel rims size: | Front wheel rims: 7.5J x 17 | R17 |