Comparison Mercedes-Benz S-class Long (W221) S 450 (340 Hp) & Mercedes-Benz SLK Coupe (R171) AMG SLK 55 Black Series V8 (400 Hp) 7G-TRONIC & Ford F-Series F-100 V 6.4 390 V8 (255 Hp) Automatic
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| Brand: | Mercedes-Benz | Mercedes-Benz | Ford |
| Model: | S-class | SLK | F-Series F-100/F-150 |
| Generation: | S-class Long (W221) | SLK Coupe (R171) | F-Series F-100 V |
| Engine / modification: | S 450 (340 Hp) | AMG SLK 55 Black Series V8 (400 Hp) 7G-TRONIC | 6.4 390 V8 (255 Hp) Automatic |
| Production start: | 2006 year | 2006 year | 1968 year |
| Production end: | 2013 year | 2008 year | 1972 year |
| Coupe type: | Sedan | Coupe | Pick-up |
| Num. of Doors: | 4 | 2 | 2 |
| Num. of seats: | 5 | 2 | 3 |
| Fuel consumption / economy - urban: | 16.5 l/100 km | ||
| Fuel consumption / economy - extra urban: | 8.1 l/100 km | ||
| Fuel consumption / economy - combined: | 11.2 l/100 km | ||
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.32 | ||
| Fuel tank volume: | 90 l | 70 l | 74 l |
| Emission standard: | Euro 4 | ||
| Power: | 340 hp | 400 hp | 255 hp |
| Max power in: | 5750 rpm. | 4400 rpm. | |
| Maximum speed: | 250 km/h | 280 km/h | |
| Acceleration from 0 to 100 km/h: | 5.9 sec | 4.5 sec | |
| Torque: | 520 Nm @ 3750 rpm. | 510 Nm @ 2600 rpm. | |
| Model Engine: | M 113.989 | ||
| Engine position: | Front, longitudinal | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 4663 cm3 | 5439 cm3 | 6391 cm3 |
| Engine oil capacity: | 8 l | ||
| Coolant: | 11.5 l | ||
| Fuel System: | Multi-point injection | Carburettor | |
| Position of cylinders: | V engine | V engine | |
| Valvetrain: | SOHC | ||
| Number of cylinders: | 8 | 8 | 8 |
| Number of valves per cylinder: | 3 | ||
| Compression ratio: | 11 | 8.6 | |
| Piston Stroke: | 92 mm | 96.01 mm | |
| Cylinder Bore: | 97 mm | 102.87 mm | |
| Wheel Drive: | Rear wheel drive | Rear wheel drive | Rear wheel drive |
| Number of Gears (automatic transmission): | 7 | 7 | 3 Cruise-O-Matic |
| Length: | 5076 mm | 4087 mm | 4636-5138 mm |
| Width: | 1871 mm | 1794 mm | |
| Height: | 1473 mm | 1271 mm | |
| Wheelbase: | 3165 mm | 2430 mm | 2921-3327 mm |
| Front track: | 1600 mm | 1524 mm | |
| Rear (Back) track: | 1606 mm | 1549 mm | |
| Wading depth: | 658-660 mm | ||
| Minimum volume of Luggage (trunk): | 560 l | 208 l | 1274-2163 l |
| Maximum amount of Luggage (trunk): | 560 l | ||
| Front suspension: | Pneumatic elastic element | Independent, spring | |
| Rear suspension: | Pneumatic elastic element | ||
| Max weight: | 2850 kg | 1790 kg | 2268 kg |
| Front brakes: | Ventilated discs | Ventilated discs | Drum |
| Rear brakes: | Ventilated discs | Ventilated discs | Drum |
| Kerb Weight: | 2100 kg | 1420 kg | |
| ABS: | yes | ||
| Steering type: | Steering rack and pinion | Steering rack and pinion | Cone worm with recirculation balls |
| Power steering: | Hydraulic Steering | Electric Steering | |
| Max. roof load: | 50 kg | ||
| Minimum turning circle (turning diameter): | 10.51 m | ||
| Tire size: | 235/55 R17 | Front wheel tires: 235/35 R 19 ZR | 215/75 R15; 225/75 R15 |
| Wheel rims size: | 7J x 15 |