7 of 7 variants have top speed data.
| Variant | Year | Body | Fuel | Top speed |
|---|---|---|---|---|
| Subaru WRX STI 2.5T Sport Premium | 2015 | Sedan | Petrol | 255 km/h (158 mph) |
| Subaru WRX STI 2.5T Sport | 2014 | Sedan | Petrol | 255 km/h (158 mph) |
| Subaru WRX STI 2.5T Sport Executive | 2014 | Sedan | Petrol | 255 km/h (158 mph) |
| Subaru WRX STI 2.5T Sport | 2010 | Hatchback | Petrol | 250 km/h (155 mph) |
| Subaru WRX STI 2.5T Sport Executive | 2010 | Hatchback | Petrol | 250 km/h (155 mph) |
| Subaru WRX STI 2.5T Sport | 2010 | Sedan | Petrol | 250 km/h (155 mph) |
| Subaru WRX STI 2.5T Sport Executive | 2010 | Sedan | Petrol | 250 km/h (155 mph) |