Question: What is the compression ratio when the continuous power is  hp (KW) at 2,200 RPM and the critical altitude is at sea level?
SQL: SELECT COUNT Compression ratio FROM table WHERE Power, continuous = hp (kW) at 2,200 RPM AND Critical altitude This is the highest altitude at which the engine can achieve its full continuous power rating. Above this altitude, power falls off with height as with a naturally aspirated engine . See Supercharger#Altitude effects for details. = sea level