Given the choice between the petrol and the diesel engine, which would be best suited for me?
My daily usage is around 50-60 km.
Since your daily driving is quite low, a car with a petrol engine would serve all your purposes. Typically, the car would provide you with a low running cost since the maintenance cost of the petrol engine is quite low. Diesel cars are recommended to those customers who drive more than 100 kilometers in a day.