Disappointed fan of old Santro

Not enough pulling power. Very much disappointed as I was an owner and fan of old model Santro. All other aspects are good, satisfactory or excellent.I have not travelled to long-distance or good highways. But in circumstances where we need to travel hilly sections, the car lacks enough power to pull it. I cannot but remember the performance of my earlier Santro car which I used for about 7 years with full satisfaction.