The war on emissions has been on-going with automakers continuously pressed to lower emissions output from their vehicles year after year. Over in Europe, the strategy to meet stringent emissions regulations has resulted in the downsizing of engines and the addition of turbochargers to make up for the power deficit. As such, the average engine size in Europe is anywhere between 1.3- and 1.9-liters. The shrinking of engines has worked well for emissions tests in Europe up until now, but according to Reuters, new on-the-road emissions testing has shown that smaller engines actually fail to meet the latest standards. This being the case, automakers are being forced to rethink their strategy, and those smaller engines could be on the chopping block.