The Nanni N5.180 CR2 is a 182 HP (134 kW) inline 4-cylinder, 4-stroke diesel inboard marine engine with a 4.5-litre displacement based on a John Deere engine block. It features turbocharged air-to-seawater aftercooling, closed cooling with heat exchanger, and direct injection with electronic control. The engine is HVO compliant and meets IMO MARPOL Annex VI, RCD2, EPA Marine Tier 3, and NRMM emissions standards.