Liebherr H9X4 is a very compact 9 liters 4-cylinder hydrogen engine. Still in development, this engine presents promising and encouraging results in terms of CO2 and nitrogen oxides (NOx) emissions. This 4-cylinder engine comes with a port-fuel injection (PFI) technology, which shows great performances and ensures best-in-class reliability.

• Configuration - In-line engine

  In-line engine

• Number of cylinders - 4

  4

• Displacement - 9.0 l

  9.0 l