title: Opposed four engines
text: # Opposed four engines
  
  The term opposed four engine may refer to:
  
  * a flat-4 engine, with two pairs of cylinders diametrically opposed to each other on either side of a common crankshaft
  * a four-cylinder H engine in which two flat-twin engines are coupled together, one above the other
  * an opposed-piston engine with four cylinders, and consequently eight pistons
  