Maruti Suzuki Ciaz is powered by 1.3 L Multijet diesel engine sourced from Fiat. Even though this engine produces 89 BHP and 200 NM of torque, compared to Ciaz rivals this engine is under powered and Maruti Suzuki is paying huge amount of money to Fiat as loyality for using this engine. According to report on MotorBeam, Maruti Suzuki is developing a new 1.5 L diesel engine and the road test for the engine has been completed. The first product to launch with new engine is Ciaz in 2018. Along with new diesel engine, Maruti Suzuki is also developing a new 1.5 L petrol engine to replace current 1.4 L K-Series engine. In future, Maruti will replace all 1.3 L Multijet engine with this new 1.5 L diesel engine. 

source : MotorBeam