The D13B400 is a 13-liter, six-cylinder EGR diesel engine with unit injectors, four valves per cylinder, and an overhead camshaft. 400 horsepower from the engine It satisfies the EU Euro-4 standards for exhaust gas toxicity without first being cleaned.

The following characteristics are present in the D13B400 engine:
- maximum torque over a broad speed range.
- EMS, or electronic engine management.
- Low exhaust gas emissions without pre-treatment, meeting Euro 4 standards.
- Volvo Engine Brake (VEB) provides powerful engine braking (optional).
- An optional rear-mounted power takeoff with a high power output
- ventilation in the closed crankcase (optional).
Specifications
| Engine’s type | diesel |
| Production years | 09/2007 |
| Power output, kW at rpm | 294 at 1450 |
| Power output, hp at rpm | 400 at 1450 |
| Displacement, l | 12800 |
| Number of cylinders | 6 |
| Valves | 24 |
| Torque output, Nm / rpm | 1050 at 1400 |
| Compression | 15.9:1 |
| Cylinder bore, mm | 131 |
| Piston stroke, mm | 158 |
| Crankshaft bearings | 7 |
| Configuration | inline |
| Fuel type | diesel |
| Fuel system | direct injection |
| Turbine | turbo / charge air cooler |
| Euro standards | Euro 4/Euro 5 |
| Cylinder head | SOHC/OHC |
| Timing mechanism | spur gear |
| Timing | rocker arm |
| Cooling | water |
Construction trucks are the intended use for the D13B400. With an overhead camshaft, four valves per cylinder, and electronic fuel injection, this engine boasts a sturdy and dependable design. The design offers excellent fuel efficiency, high dependability, and good driving characteristics. Because the timing mechanism is at the back of the engine, vibration is lessened and a power take-off can be installed there. Both low exhaust emissions and low noise levels are characteristics of the D13B400 engine. The Euro 4 emission standards are satisfied by the EGR system.
