D902 (15.8-16HP range):
— 3-cylinder, smoother at low RPM
— Lighter weight — matters in sub-2-ton machines
— Fuel consumption slightly lower on light tasks
— Plenty of power for 1.5-2 ton applications
— Cold start is excellent
D1105 (25HP range):
— 4-cylinder, noticeably more torque at working RPM
— Better suited to 2.5-3 ton frames
— Handles sustained heavy digging without hunting for RPM
— More hydraulic flow available at working speed
— You feel the difference in hard soil and clay