Technical specifications
| Clear list | Smart Forfour | Opel Karl |
| Totals | Smart Forfour 0.9 turbo × | Opel Karl 1.0 × |
| Mark | Smart | Opel |
| Model | Forfour 0.9 turbo | Karl 1.0 |
| Year | 2014 | 2015 |
| Number of doors/seats | 5/4 | 5/5 |
| Body type | Hatch | Hatch |
| Unladen Weight | 995 (950) | 865 |
| Gross Weight Limit | 1420 (1450) | - |
| Top Speed, km/h | 165 (165) | 170 |
| Acceleration 0-100 kph | 11.2 (11.9) | 15.5 |
| Minimum turning radius, m | 4.5 | 5 |
| Cargo Volume, min/max, L | 190/975 | 195/940 |
| Dimensions specifications, mm | Smart Forfour 0.9 turbo × | Opel Karl 1.0 × |
| Length | 3495 | 3675 |
| Width | 1665 | 1604 |
| Height | 1554 | 1476 |
| Wheelbase | 2492 | 2385 |
| Front/rear Track | 1467/1429 | 1410/1418 |
| Ground clearance | 120 | - |
| Engine specifications | Smart Forfour 0.9 turbo × | Opel Karl 1.0 × |
| Type | petrol Injection / turbocharging | petrol Injection |
| Displacement, cm3 | 898 | 999 |
| Compression ratio | 9.5 | 10.5 |
| Number and arrangement of cylinders | 3 cylinders, in-line | 3 cylinders, in-line |
| The diameter of the cylinder x stroke, mm | 72.2x73.1 | 74x77.4 |
| Number of valves | 12 | 12 |
| Power, hp/rpm | 90/5500 | 75/6500 |
| Max torque, Nm/RPM | 135/2500 | 95/4500 |
| Transmission specifications | Smart Forfour 0.9 turbo × | Opel Karl 1.0 × |
| Gearbox | 5-speed manual / 6-speed tiptronic | 5-speed manual |
| Drive Type | Rear wheel drive | Front wheel drive |
| Suspension specifications | Smart Forfour 0.9 turbo × | Opel Karl 1.0 × |
| Front | MacPherson strut | MacPherson strut |
| Rear | Dependent suspensions | Dependent suspensions |
| Tire Size | 165/65 R15, 185/60 R15 | 165/65 R14 |
| Disk | 4x114.3 ET46 d67.1
| 4x100 ET40 d56.5
|
| Brakes specifications | Smart Forfour 0.9 turbo × | Opel Karl 1.0 × |
| Front | Ventilated discs | Ventilated discs |
| Rear | Drums | Drums |
| Fuel consumption specifications, L/100 km | Smart Forfour 0.9 turbo × | Opel Karl 1.0 × |
| City | 5.1 (5.2) | 5.6 |
| Highway | 3.9 (3.6) | 3.9 |
| Combined | 4.3 (4.2) | 4.5 |
| Fuel | 95 | 95 |
| Tank, L | 28 | 32 |
| Clear list | Smart Forfour | Opel Karl |
