3406B: This is a six-cylinder, four-stroke diesel engine with a displacement of 14.6 liters. It has a power range of 218-492 kW (292-660 hp) and a torque range of 1350-2084 Nm (996-1536 lb-ft).
3406C: This is an updated version of the 3406B, with similar specifications but with improved fuel efficiency and emissions control.
3408: This is an eight-cylinder, four-stroke diesel engine with a displacement of 18.1 liters. It has a power range of 366-634 kW (490-850 hp) and a torque range of 2213-3470 Nm (1632-2556 lb-ft).
3408B: This is an updated version of the 3408, with similar specifications but with improved fuel efficiency and emissions control.
3408C: This is another updated version of the 3408, with similar specifications but with even further improvements to fuel efficiency and emissions control.
3412: This is a 12-cylinder, four-stroke diesel engine with a displacement of 27.0 liters. It has a power range of 537-1055 kW (720-1415 hp) and a torque range of 3266-5115 Nm (2408-3771 lb-ft).