There were two Sulzer 8LV31 straight-eight engines placed side by side with a gangway between them. This arrangement had been patented by Eugen Zbinden and Sulzer, patent US1632209 of 1927.[2] Each engine delivered 750 hp (continuous rating) making a total of 1,500 hp. Electrical equipment was by Secheron of Geneva and total power of the traction motors was 1,200 hp.