This decision, according to Ward's Auto (sub. req.) is one of necessity, meaning that in order to comply with European Union targets for fuel efficiency and CO2 emissions, PSA Peugeot-Citroen will have to make available a range of fuel-efficient vehicles.
To that end, PSA Peugeot-Citroen is expected to gear up for production of both a naturally aspirated and a turbocharged, 1.2-liter three-cylinder engine. Both mills will be Euro 6 compliant. Come early 2013, these downsized gassers will join PSA Peugeot-Citroen's extensive stable of fuel-sipping diesel engines.
[Source: Ward's Auto – sub. req.]