316i will have a 136bhp 1.5L from the 218i
B48 2.0L will go into most 3 series
There may be an M350i model
Other new engines include:
- 3.0-litre sixes which gain approximately 30bhp in power and 30Nm in torque over the current vintage
- 328i is rated at 260bhp
- 340i six-pot good for 365bhp
- 330d and 340d remain loyal to the classic straight six
- M3 and M4 straight six, e-chargers and water injection for 500bhp
http://www.carmagazine.co.uk/spy-shots/bmw/bmw-3-series-2018-next-three-codenamed-g20-revealed/