Only one image of the lengthened sedan has been released thus far, though overseas reports say the XEL sports a 100mm-longer wheelbase than the standard car, giving it a generous 2.93 metres between the axles - just 30mm shorter than the XF.
Few details have been officially announced, but the new model is set to be produced in China through Jaguar Land Rover's (JLR) joint venture with Chery. It's likely to be built at the company's manufacturing facility in Changshu.
According to reports, the XEL will initially offered with a 2.0-litre turbocharged petrol engine in 200hp (149kW) or 250hp (186kW) trims, while a panoramic roof will be included as standard equipment.
Above: Jaguar XFL
The XEL follows the larger XFL revealed last April, and appears to have stuck to the same formula of simply lengthening the standard car for the Chinese market.
It also appears the camouflaged prototype spied in March wasn't a facelifted XF, but a pre-production version of the XEL.
Further details of the XEL are likely to be revealed at the new car's debut at the Guangzhou motor show in November.