Comparison Audi S8 (D4 facelift 2013) 4.0 TFSI COD V8 (520 Hp) quattro Tiptronic & Mercedes-Benz S-class Long (W140) S 500 (320 Hp)
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| Brand: | Audi | Mercedes-Benz |
| Model: | S8 | S-class |
| Generation: | S8 (D4 facelift 2013) | S-class Long (W140) |
| Engine / modification: | 4.0 TFSI COD V8 (520 Hp) quattro Tiptronic | S 500 (320 Hp) |
| Production start: | 2013 year | 1991 year |
| Production end: | 2015 year | 1998 year |
| Coupe type: | Sedan | Sedan |
| Num. of Doors: | 4 | 4 |
| Num. of seats: | 5 | 5 |
| Fuel consumption / economy - urban: | 13.6 l/100 km | |
| Fuel consumption / economy - extra urban: | 7.3 l/100 km | |
| Fuel consumption / economy - combined: | 9.6 l/100 km | 12.2 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.28 | |
| Fuel tank volume: | 82 l | 100 l |
| Emission standard: | Euro 6 | |
| CO2 emissions: | 225 g/km | |
| Power: | 520 hp | 320 hp |
| Max power in: | 5800 rpm. | 5600 rpm. |
| Maximum speed: | 250 km/h | 250 km/h |
| Acceleration from 0 to 100 km/h: | 4.1 sec | 7.3 sec |
| Torque: | 650 Nm @ 1700-5500 rpm. | 470 Nm/3900 rpm. |
| Engine position: | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 3993 cm3 | 4973 cm3 |
| Engine oil capacity: | 8.7 l | |
| Coolant: | 14.8 l | |
| Fuel System: | Direct injection | Multi-point injection |
| Aspiration / Turbine: | Turbo / Intercooler (Turbocharging / Intercooler) | |
| Position of cylinders: | V engine | V engine |
| Valvetrain: | DOHC | DOHC |
| Number of cylinders: | 8 | 8 |
| Number of valves per cylinder: | 4 | 4 |
| Compression ratio: | 9.3 | 10 |
| Piston Stroke: | 89 mm | 85 mm |
| Cylinder Bore: | 84.5 mm | 96.5 mm |
| Wheel Drive: | All wheel drive (4x4) | Rear wheel drive |
| Number of Gears (automatic transmission): | 8 Tiptronic | 5 |
| Length: | 5147 mm | 5213 mm |
| Width: | 1949 mm | 1886 mm |
| Width including mirrors: | 2111 mm | |
| Height: | 1458 mm | 1485 mm |
| Wheelbase: | 2994 mm | 3140 mm |
| Front track: | 1632 mm | 1606 mm |
| Rear (Back) track: | 1623 mm | 1579 mm |
| Front overhang: | 1012 mm | |
| Rear overhang: | 1141 mm | |
| Minimum volume of Luggage (trunk): | 520 l | 525 l |
| Front suspension: | Multi-link suspension | Double wishbone |
| Rear suspension: | Independent on trapezoidal lever | Helical spring |
| Max weight: | 2590 kg | 2660 kg |
| Front brakes: | Ventilated discs | Ventilated discs |
| Rear brakes: | Ventilated discs | Ventilated discs |
| Kerb Weight: | 1990 kg | 2010 kg |
| ABS: | yes | yes |
| Steering type: | Steering rack and pinion | |
| Power steering: | Electric Steering | Hydraulic Steering |
| Max. roof load: | 100 kg | |
| Permitted trailer load with brakes (8%): | 2300 kg | |
| Minimum turning circle (turning diameter): | 12.3 m | |
| Permitted trailer load with brakes (12%): | 2300 kg | |
| Permitted trailer load without brakes: | 750 kg | |
| Permitted towbar download: | 95 kg | |
| Tire size: | 265/40 R20 | 235/60 R16 |
| Wheel rims size: | 9.0J x 20 |