It is supposed to be a step down from the 330e's 2.0L engine to the B38 1.5L powerplant.
http://www.bmwblog.com/2017/08/14/spied-g20-bmw-325e-iperformance-caught-testing-full-camo/
http://www.bmwblog.com/2017/08/14/spied-g20-bmw-325e-iperformance-caught-testing-full-camo/