Comparison Smart Fortwo III cabrio Brabus 17.6 kWh (82 Hp) electric drive & Mercedes-Benz SLK (R171, facelift 2008) SLK 280 V6 (231 Hp) & Mercedes-Benz AMG GT Roadster (R190) C 4.0 V8 (558 Hp) DCT
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| Brand: | Smart | Mercedes-Benz | Mercedes-Benz |
| Model: | Fortwo | SLK | AMG GT |
| Generation: | Fortwo III cabrio | SLK (R171, facelift 2008) | AMG GT Roadster (R190) |
| Engine / modification: | Brabus 17.6 kWh (82 Hp) electric drive | SLK 280 V6 (231 Hp) | C 4.0 V8 (558 Hp) DCT |
| Production start: | 2013 year | 2008 year | 2017 year |
| Production end: | 2009 year | ||
| Coupe type: | Cabriolet | Roadster | Roadster |
| Num. of Doors: | 2 | 2 | 2 |
| Num. of seats: | 2 | 2 | 2 |
| Fuel consumption / economy - urban: | 15.1 l/100 km | ||
| Fuel consumption / economy - extra urban: | 9.0 l/100 km | ||
| Fuel consumption / economy - combined: | 11.4 l/100 km | ||
| Fuel consumption at Low speed (WLTP): | 12.8 l/100 km | ||
| Fuel Type: | Electricity | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.32 | 0.38 | |
| Fuel tank volume: | 70 l | 65 l | |
| Fuel consumption at very high speed (WLTP): | 12.9 l/100 km | ||
| Emission standard: | Euro 4 | Euro 6 | |
| CO2 emissions: | 259 g/km | ||
| Power: | 82 hp | 231 hp | 558 hp |
| Max power in: | 6000 rpm. | 5750-6750 rpm. | |
| Maximum speed: | 130 km/h | 250 , Electronically limited km/h | 316 km/h |
| Acceleration from 0 to 100 km/h: | 10.2 sec | 6.3 sec | 3.7 sec |
| CO2 emissions (WLTP): | 291-293 g/km | ||
| Torque: | 135 Nm | 300 Nm @ 2500-5000 rpm. | 680 Nm @ 1900-5750 rpm. |
| Model Engine: | M 272.942 | ||
| Engine position: | Front, longitudinal | Front, longitudinal | |
| Engine displacement: | 2996 cm3 | 3982 cm3 | |
| Engine oil capacity: | 8 l | ||
| Coolant: | 7.1 l | ||
| Fuel System: | Direct injection | ||
| Aspiration / Turbine: | BiTurbo | ||
| Position of cylinders: | V engine | ||
| Valvetrain: | DOHC | ||
| Number of cylinders: | 6 | 8 | |
| Number of valves per cylinder: | 4 | 4 | |
| Compression ratio: | 11.3 | 9.5 | |
| Piston Stroke: | 82.1 mm | ||
| Cylinder Bore: | 88 mm | ||
| All-electric range: | 145 km | ||
| Average Energy consumption: | 15.1 kWh/100 km | ||
| Electric motor power: | 82 | ||
| Electric motor Torque: | 135 Nm | ||
| Battery capacity: | 17.6 kWh | ||
| Wheel Drive: | Rear wheel drive | Rear wheel drive | |
| Number of Gears (automatic transmission): | 1 | 7 DCT | |
| Number of Gears (manual transmission): | 6 | ||
| Length: | 2727 mm | 4107 mm | 4544 mm |
| Width: | 1559 mm | 1788 mm | 1939 mm |
| Width including mirrors: | 2005 mm | 2075 mm | |
| Height: | 1565 mm | 1296 mm | 1259 mm |
| Wheelbase: | 1867 mm | 2430 mm | 2630 mm |
| Front track: | 1270 mm | 1684 mm | |
| Rear (Back) track: | 1363 mm | 1651 mm | |
| Climb angle: | 4.0 ° | ||
| Front overhang: | 898 mm | ||
| Rear overhang: | 1016 mm | ||
| Minimum volume of Luggage (trunk): | 220 l | 208 l | 165 l |
| Maximum amount of Luggage (trunk): | 340 l | ||
| Front suspension: | Double wishbone | ||
| Rear suspension: | Double wishbone | ||
| Max weight: | 1150 kg | 1770 kg | 1940 kg |
| Front brakes: | Ventilated discs | Ventilated discs | |
| Rear brakes: | Disc | Ventilated discs | |
| Kerb Weight: | 945 kg | 1380 kg | 1660 kg |
| ABS: | yes | ||
| Steering type: | Steering rack and pinion | Steering rack and pinion | |
| Power steering: | Hydraulic Steering | Electric Steering | |
| Max. roof load: | 50 kg | ||
| Minimum turning circle (turning diameter): | 8.75 m | 10.51 m | 11.47 m |
| Tire size: | Front wheel tires: 205/55 R 16 | 265/35 ZR19; 305/30 ZR20 | |
| Wheel rims size: | Front wheel rims: 7 J x 16 | R19; R20 |