Which is more fuel efficient, increasing displacement or increasing turbocharging to get the same power?


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2023-05-18

Theoretically, turbocharged engines have an advantage in obtaining similar power performance or lower fuel consumption.

Theoretically, turbocharged engines have an advantage in obtaining similar power performance or lower fuel consumption.
The principle of turbocharged engine is to force the engine to draw in air, so that more air will enter in the same cylinder volume, and more mixture will be burned and expanded in a relatively small space, producing more power than a self-priming engine, and lower fuel consumption than a self-priming engine in the same power class. Small displacement turbocharged engines are the trend. In addition to lower fuel consumption than self-priming engines of the same power level, the displacement tax, vehicle tax, and exhaust emission standards are all lower than those of self-priming engines. So car manufacturers will widely use turbocharged engines instead of self-priming engines.