You need to post the schematic of the circuit you want to substitute the opamp in.
The TL08x series has a common mode input that ranges from -V +3v to +V -1.5v; in other words, it won't "see" input that is within 3v of the negative supply, or within 1.5v of the positive supply. The CA3140 has a much wider common mode input range.
Many of the newer opamps are not available in DIP packages; they are SMT/SMD only. You need to say whether you are building a new circuit based on an old design, or repairing an existing circuit.
The input voltage range of the CA3140 is completely different to the TL081:
1) The input of the CA3140 can go a little below its negative supply voltage.
2) The input of a TL081 has the "Opamp Phase Inversion Problem" so if its input gets within 3V from the negative supply then the output suddenly goes positive.
The minimum supply for a CA3140 is 4V. The minimum supply for a TL081 is 7V.