Jaguar spokesman Stuart Schorr told Edmunds that pricing will be announced in September.
Exterior enhancements to the new model are subtle but include LED headlights and taillights, revamped daytime running lights, a larger mesh grille, chrome trim on the front air intakes and oval exhaust finishers.
Inside, a number of enhanced tech features distinguish the revamped XJ, including Jaguar's InControl Touch Pro infotainment system with an 8-inch touchscreen display. There's also a standard 17-speaker surround-sound audio system, iOS and Android connectivity and available Wi-Fi hotspot.
The redesigned instrument cluster features a navigation display placed in the driver's line of sight for easy viewing. Its functionality includes a dead-reckoning feature that allows it to keep track of the vehicle's position even when it can't pick up a GPS signal and the ability to sync up with a smartphone app for door-to-door routing.
Passengers in long-wheelbase XJ models will enjoy a new available rear-seat entertainment system with 10.2-inch high-def screens and two USB ports and one HDMI port to connect a variety of audio-video players, smartphones and tablets.
Power for the new XJ lineup is provided by Jaguar's range of all-aluminum engines, which feature direct injection, variable valve timing and stop-start systems.
The XJ R-Sport and long-wheelbase XJL Portfolio — both available in rear-drive and AWD versions — get the 3.0-liter supercharged V6 that develops 340 horsepower and 332 pound-feet of torque.
Higher-end models are powered by 5.0-liter supercharged V8 engines that put out either 470 hp and 424 lb-ft of torque for the XJ Supercharged or 550 hp and 502 lb-ft of torque for the XJR. All XJ engines are mated to ZF eight-speed automatic transmissions.
Advanced driver-assist features on the new Jaguar XJ include adaptive cruise control, park assist, close-vehicle sensing, traffic-sign recognition and 360-degree cameras. There's also All-Surface Progress Control, designed to make it easier to pull away from a stop on slippery surfaces.
Edmunds says: Consumers in the market for a luxury sedan will have a significant contender to consider when the revamped 2016 Jaguar XJ arrives at dealers this fall.