the one that you have shown is the Il-38N Equipped with the new Sea Dragon avionic suite, incorporating a new radar, a Forward looking infrared (FLIR) turret under the nose and an electronic intelligence (ELINT) system housed in a box-like structure mounted on struts above the forward fuselage.
P8i has only 1/5th of the Tu 142's Range and 1/2 of the speed.. Yes, it was quite expensive in maintaining the fleet and was not that impressive in performance as promised by the Russians..