The Smart forfour (2014-2020) was offered with 6 distinct engine configurations across its trim range.
| Engine | Power | Torque | Transmission | Drive | Top speed | 0-100 km/h | Consumption | Available on |
|---|---|---|---|---|---|---|---|---|
| 0.9L Petrol | 109 hp | 170 Nm | Automatic | Rear Wheel Drive | 180 km/h | 10.5 s | 4.6 l/100km | 2 trims |
| 0.9L Petrol | 90 hp | 135 Nm | Manual | Rear Wheel Drive | 165 km/h | 11.2 s | 4.3 l/100km | 6 trims |
| 0.9L Petrol | 90 hp | 135 Nm | Automatic | Rear Wheel Drive | 165 km/h | 11.9 s | 4.2 l/100km | 5 trims |
| Electric | 82 hp | 160 Nm | Automatic | Rear Wheel Drive | 130 km/h | 12.7 s | — | 6 trims |
| 1.0L Petrol | 71 hp | 91 Nm | Manual | Rear Wheel Drive | 151 km/h | 15.9 s | 4.2 l/100km | 11 trims |
| 1.0L Petrol | 71 hp | 91 Nm | Automatic | Rear Wheel Drive | 151 km/h | 16.9 s | 4.2 l/100km | 7 trims |
Each row is a distinct mechanical configuration — engine size, power output, transmission, drivetrain and fuel type — deduplicated across equipment trims that share the same engine. Trim-only differences (interior, wheels, options) do not create a separate row.