AN INTERNAL COMBUSTION ENGINE AND A VEHICLE

An internal combustion engine (100), comprising: - a four-stroke combustion cylinder assembly (101) configured for combustion of hydrogen gas within at least one combustion chamber (102) of the combustion cylinder assembly such as to drive a crankshaft (120) of the engine, - an intake passage (117) upstream of the cylinder assembly and an exhaust passage (118) downstream of the cylinder assembly; - a displacement compressor (110) arranged within the intake passage, the displacement compressor being configured for compression of intake gas, - an exhaust gas recirculation system (103) configured for recirculating at least a portion of the exhaust from the exhaust passage to the displacement compressor.