Mercedes-Benz just announced a new line of four-cylinder diesel engines, in a move to achieve greater fuel economy and cleaner emissions while still maintaining power comparable to six-cylinder diesels. The new four-cylinders achieve a 20 percent increase in power compared to the prior generation—204 hp in the top version—along with a 25 percent increase in torque. That's while achieving 13 percent less CO2 emission and compliance with the future EU5 emissions standard in Europe.

The new C-Class 250 CDI will debut with the 204 hp four-cylinder diesel engine in the fall; it will propel the car from 0 to 62 mph in 7.7 seconds. 220 CDI and 200 CDI versions will also be available, putting out 170 hp and 136 hp, respectively.

Mercedes says the new engines will achieve these specifications using a number of new technologies, such as two-stage turbochargers, fourth-generation common rail technology, a new piezoelectric injector concept featuring direct injector needle control, and even power-saving oil-spray nozzles and water pumps that activate only when necessary. Once again, as is frustratingly the case with nearly every clean-diesel announcement lately, we don't know if or when these vehicles will make it to the U.S.

(Source: Daimler Global Media)