Petrol and Diesel are good only , Thats why they are used . Petrol is good in price but diesel is powerful in strength , for perforamnce i think diesel is above an edge
Depends on Usage. If u r a rare user then petrol is best in terms of cost and maintenance. Else go for a diesel if u drive more than 100km per day which wil be safe for ur pocket. but diesel cars r expensiv in terms of maintenance