VW suggests engine downsizing is done; emissions rules are the reason
Green Car Reports
FEBRUARY 8, 2017
They have downsized engines across model lines, usually adding turbochargers at the same time to match the power output of the larger-displacement engines that they. emissions VW downsizing Fuel Economy TurbochargingWhen it comes to improving fuel efficiency, simply making an engine smaller is a fairly direct way to get results. It's the approach that many automakers have taken in recent years.