The recommended spark plug type for a Peugeot 1.4 engine depends on the specific model and year of the vehicle. Generally, Peugeot recommends using original equipment (OE) spark plugs or their equivalents that meet the vehicle's specifications. Here are a few examples of spark plugs that are commonly used in Peugeot 1.4 engines:
NGK
* BKR6E
* BKR6EK
* BKR6EIX
Bosch
* FR7NPP332S
* FR7LDC+
* FR7LDCX
Champion
* RC9YC
* RC10YC
* RC9YC4
It's important to consult your vehicle's owner's manual or a reliable source of information for the exact spark plug type recommended for your specific Peugeot 1.4 engine. Using the correct spark plug type can help ensure optimal performance, fuel efficiency, and reliability.