The "TU3" 1.4 engine from Peugeot is quite reliable, and is one of the most used for small PSA cars
http://en.wikipedia.org/wiki/PSA_TU_engine#TU3
It was in the Peugeot 205 on which I learned to drive, on my first car - Peugeot 106 -, and also on my current 206 SW