Electric and hybrid versions of the Ioniq were launched in 2016, and a plug-in hybrid version follows this year.
It makes the Ioniq the only car on sale available with three different electrified powertrains.
Like the hybrid version, the Ioniq Plug-in will feature the new 1.6-litre direct injection petrol, four-cylinder engine with a thermal efficiency that matches the engine in the Toyota Prius. The engine alone delivers 105PS and 114lb-ft of torque.
The electric motor produces 61PS and both units combined achieve 141PS. The battery capacity allows a range of up to 31 miles on a plug-in charge, and thereafter in the journey the Ioniq Plug-in behaves as the hybrid would, being able to recapture energy to return to the battery to be used over short distances.
Hyundai expects CO2 emissions of 32g/km for the Ioniq Plug-in, ensuring its desirability for company car drivers. Prices will be announced closer to the model’s launch, but it is expected to undercut plug-in hybrid versions of the Toyota Prius.