The Deutz D2.9 L4 engine, specifically the 2019 models, are compact, water-cooled, 4-cylinder inline diesel engines that meet Tier 4 Final emissions standards. Specifications vary by configuration, with >naturally aspirated versions typically offering around 49 HP and turbocharged options providing higher power outputs. These engines feature an electronic fuel injection system, a Common Rail system, and cooled external exhaust gas recirculation (EGR). They are designed for low maintenance, with features like a maintenance-free valve train and 500-hour oil change intervals, plus an optional DVERT® oxidation catalyst and particulate filter.