| Type | AC induction motor, liquid-cooled, with variable frequency drive | 
| Rating | 320 Volts | 
| Maximum speed of large motors (rear motor on P90D) | 18700 rpm | 
| 
                         Maximum speed of small motors (front and rear motor on 90D)  | 
                     18200 rpm | 
| 
                         *Tested in accordance with ECE R85  | 
                  |