Chevrvolet Beat PS Diesel

Dear All, After a year or so, having owned a Maruti Suzuki 800 (a used one to get trained to drive a four-wheeler), I have now decided to go for a new car. My budget is around Rs. 5,00,000/-. I wish I have reviewed each and every car and its variants in its segment and I have now shortlisted a few such as Chevy Beat PS TATA Indica V2 LE of Diesel versions and Hyundai i10 Maruti Suzuki Wagon R in Petrol versions. Though I have learned both pros and cons of these cars I am now compromised with Chevy beat diesel just because of the mileage which it claims to be 24 km pl. But I also understand that in a real world it will be lesser but believe it won’t go less than 20 km pl.  Do you think that 3 cylindered cars will not give a smooth ride as a 4 cylindered one as beat has only 3 cylinders? I am still a lay person about the maintenance and handling of a diesel car so I request your inputs in this too. My second option would be wagon R…though it is a petrol version I wish the newly refined engine will get me not less than 20 kmpl. For you kind information, the usage will be around 100 - 200 kms a week and a long drive of 200 kms a day in a month. What should be my choice? Thanks in advance for your suggestions!   Yuvaraj.     Look and Style---   Comfort---   Pickup---   Mileage---   Best Features---   Needs to improve---   Overall Experience---