The best replacement for gas engine is gas turbine.

The best alternatives to gas engine are rated as following:
★★★★★  gas turbine
★★★★★  diesel engine
★★★  electric motor
★★★  diesel
★★  electric engine
★★  diesel engine trucks
★  petrol engine
★  electric motor hp
  hybrid engine
  motor
  gas turbo engine
  propane engine
  flex fuel engine
  an 16 hp diesel

Your alternative for gas engine is not listed? Suggest!
Speaking about gas engine, one probably shouldn't forget about hydraulic pump.

Other search terms related to gas engine and their ratings are:
★★★★★ hydraulic pump
You have in mind a companion for gas engine and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of gas engine in all years. Click on graph for more.
gas engine
gas turbine
diesel engine