Looking at the engine from the front (radiator side):
* Passenger side (right): 1, 3, 5, 7
* Driver side (left): 2, 4, 6, 8
The cylinders are numbered sequentially from the front to the back of the engine, alternating sides. So, cylinder 1 is the front-most passenger-side cylinder, cylinder 2 is the front-most driver-side cylinder, and so on.