Detroit 60 Series 14L Diesel Engine Detroit 14L engine is commonly used in Freightliner Trucks and Buses because of its fuel efficiency and longevity. Detroit 14L Engine Specs Displacement: 858 Cu in Stroke: 6.3 in (160 mm) Bore: 5.12 in Horsepower: 500Hp (425hp – 515hp) Compression Ratio: 17.25:1 Torque: 1650 Detroit Diesel 14L Engine uses ECM Electronic Control Modules which ensure the fuel efficiency and DDEC system which helps in controlling the Emissions. What DDEC does Detroit 14L Engine have? Detroit diesel 14L have DDEC 4, DDEC 5 & DDEC 6 DDEC 4 which are mostly EGR Engines and are late/early production of series 60.