Should you buy Sonalika MM 18 or Powertrac ALT 3500? Find out the best tractor for your requirements based on price, engine power, transmission, features and other specifications. The Sonalika MM 18 is a 18 HP tractor, whereas Powertrac ALT 3500 is a 37 HP tractor. The Sonalika MM 18 price is INR 312,000 , whereas the Powertrac ALT 3500 price is INR 519,000.