A development of the Hispano-Suiza Ybrs engine produced in the USSR from 1935 under license as the M-100. This license was purchased to obtain a high-power inline engine intended for fighter aircraft. The engineer responsible for purchasing the license, introducing the engine into production and its further modifications was Vladimir Yakovlevich Klimov.
Compared to the M-100, the M-103 engine had an increased compression ratio and a supercharger with a higher rotational speed. The rated power increased from 780 to 850 hp. In 1938, the M-103A version appeared with a takeoff power of 1000 hp. The M-103 engine was used in the Tupolev SB-2 bombers.
The result of further changes and improvements to the purchased license was the new Klimov M-105 engine, later known as the VK-105. It was subsequently produced in large numbers during World War II.
| Configuration | 12-cylinder V |
| Cooling | liquid |
| Displacement | 36 l |
| Weight | 470 kg |
| Rated power | 850 hp |
