1. A compressor apparatus for an automotive air conditioning system which comprises brackets in an engine compartment for supporting a compressor, the compressor apparatus comprising: a casing containing a compressor compatible with the air conditioning system, wherein the casing has a first circumferential groove thereon; a mounting assembly comprising a plurality of connecting members supported on at least a first collar, wherein the first collar is receivable in the first groove on the casing, and wherein the connecting members are adapted to connect the compressor apparatus to the brackets in the engine compartment of the automobile.