Comparison Mercedes-Benz S-class Long (W221) S 350 (272 Hp) G-TRONIC & Audi S7 Sportback (C7) 4.0 TFSI V8 (420 Hp) quattro S tronic
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| Brand: | Mercedes-Benz | Audi |
| Model: | S-class | S7 |
| Generation: | S-class Long (W221) | S7 Sportback (C7) |
| Engine / modification: | S 350 (272 Hp) G-TRONIC | 4.0 TFSI V8 (420 Hp) quattro S tronic |
| Production start: | 2005 year | 2012 year |
| Production end: | 2009 year | 2014 year |
| Coupe type: | Sedan | Hatchback |
| Num. of Doors: | 4 | 5 |
| Num. of seats: | 5 | 4 |
| Fuel consumption / economy - urban: | 14.5-14.7 l/100 km | 13.4 l/100 km |
| Fuel consumption / economy - extra urban: | 7.7-7.9 l/100 km | 7.5 l/100 km |
| Fuel consumption / economy - combined: | 10.1-10.3 l/100 km | 9.6 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.29 | |
| Fuel tank volume: | 90 l | 75 l |
| Emission standard: | Euro 5 | |
| CO2 emissions: | 242-247 g/km | 225 g/km |
| Power: | 272 hp | 420 hp |
| Max power in: | 6000 rpm. | 5500-6400 rpm. |
| Maximum speed: | 250 km/h | 250 km/h |
| Acceleration from 0 to 100 km/h: | 7.3 sec | 4.7 sec |
| Torque: | 350 Nm @ 2400-5000 rpm. | 550 Nm @ 1400-5200 rpm. |
| Engine position: | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 3498 cm3 | 3993 cm3 |
| Engine oil capacity: | 8.3 l | |
| Coolant: | 12 l | |
| Fuel System: | Multi-point injection | Direct injection |
| Aspiration / Turbine: | BiTurbo | |
| Position of cylinders: | V engine | V engine |
| Valvetrain: | DOHC | DOHC |
| Number of cylinders: | 6 | 8 |
| Number of valves per cylinder: | 4 | 4 |
| Compression ratio: | 10.7 | 10.1 |
| Piston Stroke: | 86 mm | 89 mm |
| Cylinder Bore: | 92.9 mm | 84.5 mm |
| Wheel Drive: | Rear wheel drive | All wheel drive (4x4) |
| Number of Gears (automatic transmission): | 7G-TRONIC | 7 S tronic |
| Length: | 5209 mm | 4980 mm |
| Width: | 1872 mm | 1911 mm |
| Width including mirrors: | 2115 mm | 2139 mm |
| Height: | 1473 mm | 1408 mm |
| Wheelbase: | 3165 mm | 2916 mm |
| Front track: | 1604 mm | 1641 mm |
| Rear (Back) track: | 1606 mm | 1632 mm |
| Front overhang: | 871 mm | 941 mm |
| Rear overhang: | 1173 mm | 1123 mm |
| Minimum volume of Luggage (trunk): | 535 l | |
| Maximum amount of Luggage (trunk): | 560 l | 1390 l |
| Front suspension: | Independent multi-link | |
| Rear suspension: | Independent on trapezoidal lever | |
| Max weight: | 2505 kg | 2555 kg |
| Front brakes: | Disc | Ventilated discs |
| Rear brakes: | Disc | Ventilated discs |
| Kerb Weight: | 1850 kg | 1945 kg |
| ABS: | yes | yes |
| Steering type: | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Electric Steering | |
| Max. roof load: | 100 kg | |
| Permitted trailer load with brakes (8%): | 2100 kg | |
| Minimum turning circle (turning diameter): | 11.9 m | |
| Permitted trailer load with brakes (12%): | 2100 kg | |
| Permitted trailer load without brakes: | 750 kg | |
| Permitted towbar download: | 85 kg | |
| Tire size: | 235/55 R17 | 255/40 R19 |
| Wheel rims size: | R17 | 8.5J x 19 |