The TE3 is powered by two Kharkiv 2D100 prime movers. Power output of each engine is 1,470 kW (1,970 hp; 2,000 PS). Transmission is diesel electric.
Numbering
Each pair of locomotives was numbered: 001–598, 1001–1404, 2001–7805, making a total of 6807 pairs or 13,614 units. The information box shows 6808 pairs and 13,617 units. The reason for the discrepancy is not known. Possibly 3 spare units were built to cover for failures.