The 1342 ignition order in a four-cylinder engine is chosen to promote smooth operation and balance. This firing order allows for even distribution of power strokes, minimizing vibrations and enhancing performance. It also helps in maintaining a consistent torque output and reduces the chances of engine knocking. Additionally, this arrangement aids in the effective cooling of the engine by preventing overheating in any one cylinder.
It was easier for the manufactures to balance the engine, to prevent vibrations, if the firing order was 1342.
1342
1342
1342
1342 on 4 cylinder engine
1342
1342
the firing order is as follows : 153624 if its a 4 cylinder it is 1342
1342
1342 in an anti clock direction.
1342
1342 if it's the 1275 cc engine, with no. 1 at the front of the engine.