RA series bus engine

Weichai bus engines, with the displacement ranging from 2.3L to 12L and the power ranging from 88kW to 338kW meet Euro V, Euro VI and other emission standards, and are applicable to various buses with a length greater than 5m such as school buses, passenger buses, private buses, touring buses, public buses, hybrid electric buses, and special buses. These new-generation power products (RA/WP2.3N/WP3N/WP4.1N/WP4.6N) are applicable to rural public buses, minibuses, long-nose school buses, high-end MPVs, European light buses, and characterized by high reliability, strong power, fuel saving and environmental protection.

RA series bus engine

Product parameters

Number of valves per cylinder Rated power/speed
Maximum torque/speed
Min. fuel consumption on external characteristic curve
Technical route Applicable model
RA428Q150E50 2.8 4 110/3200 400/1400-2600 203 Common rail + SCR 5–6M Sprinter、high-end COASTER、VANs
RA428Q163E50 2.8 4 120/3200 420/1400-2600 203 Common rail + SCR 5–6M Sprinter、high-end COASTER、VANs
RA428Q150E61 2.8 4 110/3200 380/1400-2700 203 EGR+DOC+DPF+SCR 5–6M Sprinter、high-end COASTER、VANs
RA428Q163E61 2.8 4 120/3200 420/1400-2600 203 EGR+DOC+DPF+SCR 5–6M Sprinter、high-end COASTER、VANs


Product advantages

Power performance

  • High power, high torque (and high output torque at low speed).


  • Minimum fuel consumption is 6g/kW•h lower than that of competing products, ensuring a wide economic speed range.


  • The customized development of NVH ensures low noise and vibration.

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