In February 2021, CEO Thierry Bolloré announced that this car was cancelled as part of Jaguar's Reimagine plan,[1] although the XJ name may be revived at a later date.
[10] JLR had planned to update the Castle Bromwich plant to produce the car on the company's new Modular Longitudinal Architecture (MLA) platform.
[6] The COVID-19 pandemic in the United Kingdom forced JLR to halt non-essential spending,[12] delaying the scheduled unveiling of X391 and L392 by two months to October and November 2020.
Bolloré stated that Panthera would not be shared with Land Rover, as it was designed to allow Jaguar to provide "unique proportions" and capabilities, and would help the marque survive as it moved to a higher price point and lower volume.
Although the car's features were obscured, Autocar commented that the prototype's "long bonnet and high waistline aren't unlike those of the outgoing XJ", and the X391 would have been wider and taller than the X351.
[22] MLA was designed to accommodate underfloor batteries up to 90.2 kW-hr in size, providing up to 290 mi (470 km) of range using one traction motor on each axle.