Cost

• The primary disadvantage of two compressor refrigerators is that they are more expensive to purchase. However, two compressor refrigerators are more energy efficient than one compressor models and often need less maintenance, which can offset the cost of the initial purchase.
  
  

Performance Differences

• Two compressor refrigerators have a compressor that is dedicated to both the refrigerator and the freezer compartment. This allows for a wider range of temperature adjustment in each of the compartments. One compartment can even be turned off while the other is still in use.
  
  

Life Expectancy

• Refrigerators that use two compressors typically have a longer life span than those with only one compressor. Models with only one compressor will need to run more often as two compartments have to be cooled by the one compressor.