Comparison Mercedes-Benz SLK (R171, facelift 2008) SLK 280 V6 (231 Hp) & Opel Signum (facelift 2005) 2.8i V6 24V Turbo (230 Hp)
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| Brand: | Mercedes-Benz | Opel |
| Model: | SLK | Signum |
| Generation: | SLK (R171, facelift 2008) | Signum (facelift 2005) |
| Engine / modification: | SLK 280 V6 (231 Hp) | 2.8i V6 24V Turbo (230 Hp) |
| Production start: | 2008 year | 2005 year |
| Production end: | 2009 year | 2006 year |
| Coupe type: | Roadster | Hatchback |
| Num. of Doors: | 2 | 5 |
| Num. of seats: | 2 | 5 |
| Fuel consumption / economy - urban: | 15.7 l/100 km | |
| Fuel consumption / economy - extra urban: | 7.6 l/100 km | |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.32 | 0.32 |
| Fuel tank volume: | 70 l | 60 l |
| Emission standard: | Euro 4 | |
| Power: | 231 hp | 230 hp |
| Max power in: | 6000 rpm. | 5500 rpm. |
| Maximum speed: | 250 , Electronically limited km/h | 243 km/h |
| Acceleration from 0 to 100 km/h: | 6.3 sec | 7.6 sec |
| Torque: | 300 Nm @ 2500-5000 rpm. | 330 Nm |
| Model Engine: | M 272.942 | |
| Engine position: | Front, longitudinal | Front, transverse |
| Engine displacement: | 2996 cm3 | 2792 cm3 |
| Engine oil capacity: | 8 l | |
| Coolant: | 7.1 l | |
| Fuel System: | Multi-point injection | |
| Aspiration / Turbine: | Turbocharging | |
| Position of cylinders: | V engine | |
| Valvetrain: | DOHC | |
| Number of cylinders: | 6 | 6 |
| Number of valves per cylinder: | 4 | 4 |
| Compression ratio: | 11.3 | 9.5 |
| Piston Stroke: | 82.1 mm | 74.8 mm |
| Cylinder Bore: | 88 mm | 89 mm |
| Wheel Drive: | Rear wheel drive | Front wheel drive |
| Number of Gears (manual transmission): | 6 | 6 |
| Length: | 4107 mm | 4651 mm |
| Width: | 1788 mm | 1798 mm |
| Width including mirrors: | 2005 mm | |
| Height: | 1296 mm | 1466 mm |
| Wheelbase: | 2430 mm | 2830 mm |
| Front track: | 1536 mm | |
| Rear (Back) track: | 1525 mm | |
| Minimum volume of Luggage (trunk): | 208 l | 365 l |
| Maximum amount of Luggage (trunk): | 1410 l | |
| Front suspension: | Independent, spring | |
| Rear suspension: | Independent, spring | |
| Max weight: | 1770 kg | 2175 kg |
| Front brakes: | Ventilated discs | Disc |
| Rear brakes: | Disc | Disc |
| Kerb Weight: | 1380 kg | 1580 kg |
| ABS: | yes | |
| Steering type: | Steering rack and pinion | |
| Power steering: | Hydraulic Steering | |
| Max. roof load: | 50 kg | |
| Minimum turning circle (turning diameter): | 10.51 m | |
| Tire size: | Front wheel tires: 205/55 R 16 | 225/50 R17 |
| Wheel rims size: | Front wheel rims: 7 J x 16 | R17 |