Technical specifications
| Clear list | Opel Karl | Smart Forfour |
| Totals | Opel Karl 1.0 × | Smart Forfour 1.0 × |
| Mark | Opel | Smart |
| Model | Karl 1.0 | Forfour 1.0 |
| Year | 2015 | 2014 |
| Number of doors/seats | 5/5 | 5/4 |
| Body type | Hatch | Hatch |
| Unladen Weight | 865 | 975 (1005) |
| Gross Weight Limit | - | 1400 (1435) |
| Top Speed, km/h | 170 | 151 (151) |
| Acceleration 0-100 kph | 15.5 | 15.9 (16.9) |
| Minimum turning radius, m | 5 | 4.5 |
| Cargo Volume, min/max, L | 195/940 | 190/975 |
| Dimensions specifications, mm | Opel Karl 1.0 × | Smart Forfour 1.0 × |
| Length | 3675 | 3495 |
| Width | 1604 | 1665 |
| Height | 1476 | 1554 |
| Wheelbase | 2385 | 2492 |
| Front/rear Track | 1410/1418 | 1467/1429 |
| Ground clearance | - | 120 |
| Engine specifications | Opel Karl 1.0 × | Smart Forfour 1.0 × |
| Type | petrol Injection | petrol Injection |
| Displacement, cm3 | 999 | 999 |
| Compression ratio | 10.5 | 10.5 |
| Number and arrangement of cylinders | 3 cylinders, in-line | 3 cylinders, in-line |
| The diameter of the cylinder x stroke, mm | 74x77.4 | 72.2x81.3 |
| Number of valves | 12 | 12 |
| Power, hp/rpm | 75/6500 | 71/6000 |
| Max torque, Nm/RPM | 95/4500 | 91/2850 |
| Transmission specifications | Opel Karl 1.0 × | Smart Forfour 1.0 × |
| Gearbox | 5-speed manual | 5-speed manual / 6-speed tiptronic |
| Drive Type | Front wheel drive | Rear wheel drive |
| Suspension specifications | Opel Karl 1.0 × | Smart Forfour 1.0 × |
| Front | MacPherson strut | MacPherson strut |
| Rear | Dependent suspensions | Dependent suspensions |
| Tire Size | 165/65 R14 | 165/65 R15, 185/60 R15 |
| Disk | 4x100 ET40 d56.5
| 4x114.3 ET46 d67.1
|
| Brakes specifications | Opel Karl 1.0 × | Smart Forfour 1.0 × |
| Front | Ventilated discs | Ventilated discs |
| Rear | Drums | Drums |
| Fuel consumption specifications, L/100 km | Opel Karl 1.0 × | Smart Forfour 1.0 × |
| City | 5.6 | 4.8 (5) |
| Highway | 3.9 | 3.8 (3.6) |
| Combined | 4.5 | 4.2 (4.2) |
| Fuel | 95 | 95 |
| Tank, L | 32 | 28 |
| Clear list | Opel Karl | Smart Forfour |
