Looking down from the front of the vehicle the cylinders are:
8 7
6 5
4 3
2 1
(driver's side (US) front cylinder is #1)
Just for grins...consider this....the Discovery uses "Wasted Spark Principle".
When the ECM triggers an ignition coil to spark, current from the coil travels to one spark plug, then jumps the gap at the spark plug electrodes, igniting the mixture in the cylinder in the process. Current continues to travel along the earth path (via the cylinder head) to the spark plug negative at the cylinder that is on the exhaust ******. The current jumps across the spark plug electrode and back to the coil completing the circuit. Since it has simutaneously sparked in a cylinder that is on the exhaust ******, it has not provided an ignition source there and is consequently termed "wasted".
