Comparison Mercedes-Benz S-class (W221, facelift 2009) S 250 CDI BlueEFFICIENCY (204 Hp) G-TRONIC & Mercedes-Benz A-class (W177) AMG A 45 S (421 Hp) 4MATIC+ DCT
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| Brand: | Mercedes-Benz | Mercedes-Benz |
| Model: | S-class | A-class |
| Generation: | S-class (W221, facelift 2009) | A-class (W177) |
| Engine / modification: | S 250 CDI BlueEFFICIENCY (204 Hp) G-TRONIC | AMG A 45 S (421 Hp) 4MATIC+ DCT |
| Production start: | 2011 year | 2019 year |
| Production end: | 2013 year | |
| Coupe type: | Sedan | Hatchback |
| Num. of Doors: | 4 | 5 |
| Num. of seats: | 5 | 5 |
| Fuel consumption / economy - urban: | 7.0-7.1 l/100 km | 10.5-10.3 l/100 km |
| Fuel consumption / economy - extra urban: | 5 l/100 km | 7.2-7.1 l/100 km |
| Fuel consumption / economy - combined: | 5.7-5.8 l/100 km | 8.3-8.4 l/100 km |
| Fuel consumption at Low speed (WLTP): | 8.3 l/100 km | |
| Fuel Type: | Diesel | Petrol (Gasoline) |
| Fuel tank volume: | 83 l | 51 l |
| Fuel consumption at very high speed (WLTP): | 8.7 l/100 km | |
| Emission standard: | Euro 5 | Euro 6d ISC-FCM |
| CO2 emissions: | 149-151 g/km | 189-192 g/km |
| Power: | 204 hp | 421 hp |
| Max power in: | 4200 rpm. | 6750 rpm. |
| Maximum speed: | 240 km/h | 270 km/h |
| Acceleration from 0 to 100 km/h: | 8.2 sec | 3.9 sec |
| CO2 emissions (WLTP): | 190-198 g/km | |
| Torque: | 500 Nm @ 1600-1800 rpm. | 500 Nm @ 5000-5250 rpm. |
| Model Engine: | OM 651.961 | M 139.980 |
| Engine position: | Front, transverse | Front, transverse |
| Engine displacement: | 2143 cm3 | 1991 cm3 |
| Engine oil capacity: | 6.5 l | |
| Fuel System: | Diesel Commonrail | Direct injection |
| Aspiration / Turbine: | Turbocharger / Intercooler | Turbocharger |
| Position of cylinders: | Inline | Inline |
| Valvetrain: | CAMTRONIC | |
| Number of cylinders: | 4 | 4 |
| Number of valves per cylinder: | 4 | 4 |
| Compression ratio: | 16.2 | 9 |
| Piston Stroke: | 92 mm | |
| Cylinder Bore: | 83 mm | |
| Wheel Drive: | Rear wheel drive | All wheel drive (4x4) |
| Number of Gears (automatic transmission): | 7G-TRONIC | 8 DCT AMG SPEEDSHIFT |
| Length: | 5096 mm | 4445 mm |
| Width: | 1871 mm | 1850 mm |
| Width including mirrors: | 2120 mm | |
| Height: | 1479 mm | 1412 mm |
| Wheelbase: | 3035 mm | 2729 mm |
| Front track: | 1600 mm | 1597 mm |
| Rear (Back) track: | 1606 mm | 1558 mm |
| Ride height(clearance): | 97 mm | |
| Approach angle: | 10.3 ° | |
| Departure angle: | 13.6 ° | |
| Ramp angle: | 9 ° | |
| Front overhang: | 888 mm | 926 mm |
| Rear overhang: | 1173 mm | 790 mm |
| Minimum volume of Luggage (trunk): | 560 l | 370 l |
| Maximum amount of Luggage (trunk): | 1210 l | |
| Front suspension: | Independent type McPherson | |
| Rear suspension: | Multi-link independent | |
| Max weight: | 2565 kg | 2080 kg |
| Front brakes: | Disc | |
| Rear brakes: | Disc | |
| Kerb Weight: | 1895 kg | 1550 kg |
| ABS: | yes | yes |
| Steering type: | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Electric Steering | |
| Minimum turning circle (turning diameter): | 11.8 m | 11.54 m |
| Permitted trailer load with brakes (12%): | 1500 kg | |
| Permitted trailer load without brakes: | 750 kg | |
| Tire size: | 235/55 R17 | 245/35 R19 |
| Wheel rims size: | R17 | 8.5J x 19 |