February 3, 2006 PSA Peugeot Citroen has unveiled two demonstrator vehicles featuring a diesel-electric hybrid powertrain: the Peugeot 307 and the Citroen C4 Hybride HDi. Average diesel consumption for these two cars is 3.4 litres per 100 kilometres (83 mpg) with 90 grams of CO2 emitted per kilometre - a record for compact cars. This is some 25% better than a similar vehicle equipped with a petrol hybrid system, or as much as a litre per 100 kilometres (20 mpg) in combined urban and motorway driving. PSA Peugeot Citroen’s Hybrid HDi technology comprises a 1.6-litre HDi diesel engine, a particulate filter system (DPFS), the latest generation Stop & Start system, an electric motor, inverter, high-voltage battery pack and dedicated control electronics. The cars are also equipped with an electronically managed manual gearbox.