How to compare turboprop engines and with which values?
This database covers turboshaft and turboprop engines. Typically, the key factors one would use to compare such engines are:


SFC: Specific fuel consumption. This is how many kg/s (or lb/s) of fuel the engine consumes to produce 1 kW (or 1 hp). To calculate the SFC, divide the fuel flow at a throttle position by the amount of shaft power produced at that throttle setting. SFC decreases as overall pressure ratio increases. A low SFC means a more fuel efficient engine.
Specific power. This is, how much shaft power (kW) is produced per kg of air ingested by the engine. To calculate this, divide the shaft power by the air mass flow. A high specific power means you can get the power you need from a smaller, and hence lighter engine. A higher figure occurs when the engine has a high turbine temperature, and aerodynamically efficient compressors and turbines.
Power to weight ratio. To calculate this, divide the shaft power produced by the engine weight. As above, a higher figure occurs when the engine has a high turbine temperature, and aerodynamically efficient compressors and turbines.