Unveiled in February 2019, and officially presented at the 2019 Geneva Motor Show, this concept is a sporty plug in hybrid version of the 508.

The maximum combined output of 400 PS (294 kW; 395 hp) and 500 N⋅m (369 lbf⋅ft) of torque is attained, thanks to a 200 PS (147 kW; 197 hp) petrol engine and 110 PS (81 kW; 108 hp) electric motor at the front, and a 200 PS (147 kW; 197 hp) electric motor on the rear axle (although the sum of the power numbers of each engine/motor sum to around 500 hp, the hybrid system cannot provide peak power for all three systems at once so maximum real world power output is lower at around 400 hp).

0 to 100 km/h (62 mph) is accomplished in 4.3 seconds, with an electronically limited top speed of 250 km/h (155 mph). Its 11.8 kWh battery allows this 508 to travel up to 50 km (31 mi) on electricity alone. Its CO2 emissions are 49 g/km per the WLTP test cycle. It also gets a sportier bodykit to improve aerodynamics. This concept will spawn a similar sporty production model which will be available, both as a saloon and an estate, in the second half of 2020.