Brand CEO Ralf Speth confirmed the model will be ready for market launch at the end of 2017, leaving sources convinced it'll be shown in production form in the coming days.
Speaking at the Frankfurt motor show, Speth said both the regular Range Rover and Range Rover Sport models will gain the new electrified powerplant, which is expected to combine 2.0-litre Ingenium petrol power with an electric drive unit.
The former power source is predicted to provide 295bhp and 295lb ft, while the latter injects 201bhp and 332lb ft and will also enable about 30 miles of electric-only range.
The electric drive technology was created in-house and fits into the existing structure of the Range Rover model line-up. It's mated to an eight-speed ZF automatic gearbox and sources ists power from a lithium ion battery located beneath the boot floor.
Sightings of several Range Rover Sport PHEV development cars have shown no major aesthetic changes to the model's exterior, suggesting little more than badges and a charging port will signify its zero-emissions capability.
The Range Rover PHEV's closest rival will be the BMW X5 xDrive40e, but the hybrid-electric X5 electric motor produces 113bhp, meaning it is likely to fall short of the Ranger Rover's straight-line and electric-only performance.