The new engine will help the T-90s operate more effectively in high-altitude areas of Ladakh and Sikkim, where thin air tends to affect the engine performance. The upgrade will enhance the battlefield mobility of these tanks especially in high-altitude areas by increasing the power-to-weight ratio. The T-90 tanks, which are currently powered by 1000 horsepower (hp) engines, will be upgraded to 1350 hp engines. The project is likely to be bagged by the Russian Rosoboronexport, which is doing a similar power upgrade for the T-72 tank. New Delhi: The upgrade of India’s frontline T-90 tanks—following the lessons learnt from the…