HYbrid4 is PSA Peugeot-Citroën's in-house developed TTR hybrid[1] powertrain system, shared between the two manufacturers. It takes the form of a diesel engine powering the front wheels coupled with an electric motor powering the rear wheels to provide a 4WD hybrid with a short fully electric range. The system made its production debut on the Peugeot 3008 HYbrid4 in 2011, emitting 99 g of carbon dioxide per kilometer.[2] The 3008 HYbrid4 returns combined fuel consumption of 3.8 litres/100 km, beating the smaller Toyota Prius. It also operates in four driver-selected modes: Auto, Sport, ZEV (pure-electric) and 4WD.[3]
The 1st generation HYbrid4 system was available 2011–2017. Since 2020 there's a new HYbrid/HYbrid4 system, which is using plug-in technology, either FWD or AWD with power between 180hp (308 1.6 HYbrid) and 360hp (508 PSE).