If your car is single point injection, as Oddball said, it'll be the C14NZ. If it's a carb model (I thought all the MK2 1.4's were??), it'll be the 14NV.
There is a flat face on the top, gearbox side of the block (behind the dipstick area) towards the front of the car with the engine number stamped on it.
just wanted to know really, not a bad engine in my opinion still goin strong with 113,000 something like that apart from some knockin coming from under the head (in the valve closests to the drivers side)