An internal combustion engine includes

a four-stroke combustion cylinder assembly configured for combustion of hydrogen gas within at least one combustion chamber of the combustion cylinder assembly such as to drive a crankshaft of the engine,
an intake passage upstream of the cylinder assembly and an exhaust passage downstream of the cylinder assembly;
a displacement compressor arranged within the intake passage, the displacement compressor being configured for compression of intake gas,
an exhaust gas recirculation system configured for recirculating at least a portion of the exhaust from the exhaust passage to the displacement compressor.