Engine & PerformanceEngine Model: Scania DC12 14 / DC12 06 Engine Type: 11.7L, 6-cylinder in-line turbocharged diesel with intercooler Displacement: 11,705 cc (11.7 L) Maximum Power: 420 hp (309–313 kW) @ 1,800–1,900 rpm Maximum Torque: 2,100 Nm @ 1,100–1,300 rpm Fuel System: Unit Injectors (PDE) or High-Pressure Common Rail (XPI on later Euro 5 versions)Emission Standards: Euro 3, Euro 4, or Euro 5 (depending on manufacturing year/market) Transmission & DrivetrainGearbox Models:Manual: Scania GRS900 / GRS905 (14-speed range-splitter manual gearbox) Semi-Automatic / Automated: Scania Opticruise (12-speed or 14-speed options with optional automated clutch) Retarder / Braking: Scania hydraulic retarder (optional/standard depending on spec) + engine exhaust brake.