Comparison Mercedes-Benz S-class (W221) S 500 (388 Hp) 4MATIC G-TRONIC & Alfa Romeo 4C 1.7 (240 Hp)
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| Brand: | Mercedes-Benz | Alfa Romeo |
| Model: | S-class | 4C |
| Generation: | S-class (W221) | 4C |
| Engine / modification: | S 500 (388 Hp) 4MATIC G-TRONIC | 1.7 (240 Hp) |
| Production start: | 2005 year | 2013 year |
| Production end: | 2009 year | 2016 year |
| Coupe type: | Sedan | Coupe |
| Num. of Doors: | 4 | 2 |
| Num. of seats: | 5 | 2 |
| Fuel consumption / economy - urban: | 18-18.2 l/100 km | 9.8 l/100 km |
| Fuel consumption / economy - extra urban: | 8.8-9.0 l/100 km | 5.0 l/100 km |
| Fuel consumption / economy - combined: | 12.1-12.3 l/100 km | 6.8 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.335 | |
| Fuel tank volume: | 90 l | 40 l |
| Emission standard: | Euro 6 | |
| CO2 emissions: | 289-294 g/km | 157 g/km |
| Power: | 388 hp | 240 hp |
| Max power in: | 6000 rpm. | 6000 rpm. |
| Maximum speed: | 250 km/h | 258 km/h |
| Acceleration from 0 to 100 km/h: | 5.4 sec | 4.5 sec |
| Torque: | 530 Nm @ 2800-4800 rpm. | 350 Nm @ 2200-4250 rpm. |
| Model Engine: | M 273.968 | |
| Engine position: | Front, longitudinal | Middle, transverse |
| Engine displacement: | 5461 cm3 | 1742 cm3 |
| Engine oil capacity: | 8.5 l | 5.8 l |
| Coolant: | 8.5 l | 10.6 l |
| Fuel System: | Multi-point injection | Direct injection |
| Aspiration / Turbine: | Turbocharging | |
| Position of cylinders: | V engine | Inline |
| Valvetrain: | DOHC | DOHC |
| Number of cylinders: | 8 | 4 |
| Number of valves per cylinder: | 4 | 4 |
| Compression ratio: | 10.7 | 9.25 |
| Piston Stroke: | 90.5 mm | 80.5 mm |
| Cylinder Bore: | 98 mm | 83 mm |
| Wheel Drive: | All wheel drive (4x4) | Rear wheel drive |
| Number of Gears (automatic transmission): | 7G-TRONIC | Alfa TCT 6 |
| Length: | 5079 mm | 3989 mm |
| Width: | 1872 mm | 1864 mm |
| Width including mirrors: | 2115 mm | |
| Height: | 1473 mm | 1183 mm |
| Wheelbase: | 3035 mm | 2380 mm |
| Front track: | 1604 mm | 1639 mm |
| Rear (Back) track: | 1606 mm | 1604 mm |
| Ride height(clearance): | 114 mm | |
| Front overhang: | 871 mm | |
| Rear overhang: | 1173 mm | |
| Minimum volume of Luggage (trunk): | 560 l | 110 l |
| Front suspension: | Pneumatic elastic element | Double wishbone |
| Rear suspension: | Pneumatic elastic element | McPherson |
| Max weight: | 2620 kg | |
| Front brakes: | Ventilated discs | Ventilated discs |
| Rear brakes: | Ventilated discs | Ventilated discs |
| Kerb Weight: | 1935 kg | 895 kg |
| ABS: | yes | yes |
| Steering type: | Steering rack and pinion | Steering rack and pinion |
| Minimum turning circle (turning diameter): | 11.8 m | 12.10 m |
| Tire size: | 235/55 R17 | 205/45 R17; 235/40 R18 |
| Wheel rims size: | 8J x 17 | R17; R18 |