Comparison Mercedes-Benz S-class (W221) S 550 (388 Hp) G-TRONIC & Audi A8 (D5, facelift 2021) 60 TFSI V8 (460 Hp) MHEV quattro tiptronic & Mercedes-Benz SL (R231) AMG SL 63 (537 Hp) SPEEDSHIFT
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| Brand: | Mercedes-Benz | Audi | Mercedes-Benz |
| Model: | S-class | A8 | SL |
| Generation: | S-class (W221) | A8 (D5, facelift 2021) | SL (R231) |
| Engine / modification: | S 550 (388 Hp) G-TRONIC | 60 TFSI V8 (460 Hp) MHEV quattro tiptronic | AMG SL 63 (537 Hp) SPEEDSHIFT |
| Production start: | 2005 year | 2021 year | 2012 year |
| Production end: | 2009 year | 2015 year | |
| Coupe type: | Sedan | Sedan | Roadster |
| Num. of Doors: | 4 | 4 | 2 |
| Num. of seats: | 5 | 5 | 2 |
| Fuel consumption / economy - urban: | 13.9 l/100 km | ||
| Fuel consumption / economy - extra urban: | 7.6 l/100 km | ||
| Fuel consumption / economy - combined: | 11.7 l/100 km | 9.9 l/100 km | |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.27 | ||
| Fuel tank volume: | 90 l | 82 l | 75 l |
| Combined fuel consumption (WLTP): | 10.9-11.8 l/100 km | ||
| Emission standard: | Euro 6d-ISC-FCM | Euro 5 | |
| CO2 emissions: | 231 g/km | ||
| Power: | 388 hp | 460 hp | 537 hp |
| Max power in: | 6000 rpm. | 5500 rpm. | 5500 rpm. |
| Maximum speed: | 250 km/h | 250 , Electronically limited km/h | 250 km/h |
| Acceleration from 0 to 100 km/h: | 5.4 sec | 4.4 sec | 4.3 sec |
| CO2 emissions (WLTP): | 248-269 g/km | ||
| Torque: | 530 Nm @ 2800 rpm. | 660 Nm @ 1850-4500 rpm. | 800 Nm @ 2000-4500 rpm. |
| Model Engine: | M 273.96x | CXYA | |
| Engine position: | Front, longitudinal | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 5461 cm3 | 3996 cm3 | 5461 cm3 |
| Engine oil capacity: | 8.5 l | 9.5 l | |
| Coolant: | 11.5 l | 15.9 l | |
| Fuel System: | Multi-point injection | Direct injection | Direct injection |
| Aspiration / Turbine: | BiTurbo | ||
| Position of cylinders: | V engine | V engine | V engine |
| Valvetrain: | DOHC | DOHC | |
| Number of cylinders: | 8 | 8 | 8 |
| Number of valves per cylinder: | 4 | 4 | |
| Compression ratio: | 10.7 | 11.1 | 10 |
| Piston Stroke: | 90.5 mm | 86 mm | |
| Cylinder Bore: | 98 mm | 86 mm | |
| Wheel Drive: | Rear wheel drive | All wheel drive (4x4) | Rear wheel drive |
| Number of Gears (automatic transmission): | 7G-TRONIC | 8 tiptronic | AMG SPEEDSHIFT MCT 7G Sport |
| Length: | 5079 mm | 5190 mm | 4617 mm |
| Width: | 1872 mm | 1945 mm | 1877 mm |
| Width including mirrors: | 2130 mm | ||
| Height: | 1473 mm | 1473 mm | 1315 mm |
| Wheelbase: | 3035 mm | 2998 mm | 2585 mm |
| Front track: | 1604 mm | 1645 mm | 1600 mm |
| Rear (Back) track: | 1606 mm | 1633 mm | 1604 mm |
| Approach angle: | 11 ° | ||
| Departure angle: | 15 ° | ||
| Front overhang: | 1007 mm | ||
| Rear overhang: | 1185 mm | ||
| Minimum volume of Luggage (trunk): | 560 l | 505 l | 241 l |
| Maximum amount of Luggage (trunk): | 381 l | ||
| Front suspension: | Pneumatic elastic element | Independent multi-link | |
| Rear suspension: | Pneumatic elastic element | Multi-link independent | |
| Max weight: | 2545 kg | 2765 kg | 2180 kg |
| Front brakes: | Ventilated discs | Ventilated discs | Ventilated discs |
| Rear brakes: | Ventilated discs | Ventilated discs | Ventilated discs |
| Kerb Weight: | 1865 kg | 2045 kg | 1845 kg |
| ABS: | yes | yes | |
| Steering type: | Steering rack and pinion | Steering rack and pinion | |
| Power steering: | Electric Steering | Electric Steering | Electric Steering |
| Max. roof load: | 90 kg | ||
| Permitted trailer load with brakes (8%): | 2300 kg | ||
| Minimum turning circle (turning diameter): | 12.5 m | 11.1 m | |
| Permitted trailer load with brakes (12%): | 2300 kg | ||
| Permitted trailer load without brakes: | 750 kg | ||
| Permitted towbar download: | 95 kg | ||
| Tire size: | 255/45 R18 | 255/45 R19; 265/40 R20; 265/35 R21 | 255/35 ZR19; 285/30 ZR19 |
| Wheel rims size: | 8.5J x 18 | 9J x 19; 9J x 20; 9J x 21 | R19 |