For the C's:
The 1.8 L X18XE I4 (petrol) is probably the GSi engine (around 124hp).
All of the diesels look shit, except maybe the CDTI (which is just under 100hp).
20-25hp can make a significant difference with small cars, I know from experience.
Plus diesels are all torque and not much power.
For the B's:
I think most if not all the cars here are just 1.4l...all of the ones I've looked at are single cam.