The HDI unit will initially be available in 2.0- or 2.2-litre supercharged versions, equipped with two or four valves per cylinder. Within a year of launch, however, PSA will be offering 22 applications. PSA says its new unit will reduce fuel consumption by 20% - compared to conventional diesel engines - while significantly reducing harmful emissions, noise and vibration.
PSA says that compared to its non-direct injection predecessor, the HDI engine cuts emissions of the so-called greenhouse gas carbon dioxide by 20%, carbon monoxide by 40%, unburned hydrocarbons by 50% and particulates by 60%. Ozone formation potential is cut by half. Levels of nitrogen oxide remain stable, but PSA is planning to cut NOx emissions with the introduction of a deNox catalytic converter system as standard equipment from February 1999.