Cummins L300-20 Diesel Engine 300HP Vehicle Engine Assembly
6-cylinder in-line diesel engine for trucks, buses, coaches and municipal vehicles, supplied as the Cummins L300-20 at 221 kW (300 HP) at 2200 rpm from 8.9 L.
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What This Engine Is Built For
MEP Power supplies the Cummins L300-20 as a complete 6-cylinder in-line vehicle diesel engine of 8.9 L running a 114 * 145 mm bore and stroke. It is rated at 221 kW (300 HP) at 2200 rpm and develops 1180 N.m @ 1400 rpm. The engine is turbocharged & air-air intercooled and water cooled, with a BOSCH P7100 Pump/RVQ-K Governor fuel system. It is built at the Dongfeng Cummins Plant and carries Euro II. Typical duty is trucks, buses, coaches and municipal vehicles; dry weight with flywheel and alternator is 650 Kg and the overall envelope is 1149mm*799mm*1022mm.
Key Benefits
- Delivers 221 kW (300 HP) at 2200 rpm from 8.9 L as a factory-rated assembly.
- Peak torque of 1180 N.m @ 1400 rpm holds the load without downshifting or derating.
- Turbocharged & Air-Air Intercooled induction with water cooling keeps charge temperature under control in continuous duty.
- Supplied to Euro II, so the unit can be registered in markets that require it.
- Dry weight 650 Kg and envelope 1149mm*799mm*1022mm are published so the installation can be checked before ordering.
- Rated for continuous running up to 3000 m altitude.
Application Scenarios
- Heavy truck engine assembly replacement
- City bus and coach repower
- Mixer, tipper and refuse body chassis
- Light commercial vehicle conversion
Who It Is For
- Truck and bus fleets doing engine assembly swaps instead of in-frame rebuilds
- Body builders and chassis converters specifying a known driveline
- Workshops supporting Dongfeng and other Cummins-powered vehicles
- Municipal fleets running refuse, mixer and utility bodies
Problems It Solves
- In-frame rebuilds tie up a bay for days and still leave old ancillaries in service.
- Emission compliance has to be matched to the market the vehicle runs in.
- Mixed fleets with several engine families multiply the parts a workshop must carry.
- Identifying the right L300-20 variant from a serial number takes experience; MEP Power checks the configuration before quoting.
Specification As Published
Values below are the published data for this unit. Where a figure is not listed it was not stated by the source data sheet; ask and we will confirm before you order.
| Model | L300-20 |
| Type | 6 Cylinders in Line |
| Displacement | 8.9 L |
| Bore x Stroke | 114 * 145 |
| Net Weight (with flywheel and alternator) | 650 Kg |
| Overall Dimension | 1149mm*799mm*1022mm |
| Manufacturing Plant | Dongfeng Cummins Plant |
| Rated Power/Speed | 221 kW/300HP |
| Rated Speed | 2200 rpm |
| Max Torque/Speed | 1180 N.m @ 1400 rpm |
| Max No-load Governed Speed | 2500 rpm |
| Idle Speed | 700±100 rpm |
| Fuel Consumption at Rated Power | 225g/Kw.h |
| Max Continuous Running Altitude | 3000 m |
| Certification | Euro II |
| Aspiration | Turbocharged & Air-Air Intercooled |
| Fuel System | BOSCH P7100 Pump/RVQ-K Governor |
| Compression Ratio | 16.6:1 |
| Electrical System (starter motor/alternator) | 12V(500A)/24V (250A) |
| Lowest Starting Temp (without auxiliary system) | -10℃/-25℃ |
| Engine Cooling Fluid Volume | 11.1 L |
| Cooling Method | Water Cooled |
Technical Features
- Cylinders: 6 Cylinders in Line
- Displacement: 8.9 L
- Bore and stroke: 114 * 145
- Aspiration: Turbocharged & Air-Air Intercooled
- Fuel system: BOSCH P7100 Pump/RVQ-K Governor
- Electrical system: 12V(500A)/24V (250A)
- Compression ratio: 16.6:1
- Coolant capacity: 11.1 L
Quality Control
- Every engine is inspected by the MEP Power inspection team before it leaves the warehouse
- Engine, configuration and serial numbers are recorded and photographed for the buyer
- Genuine and OEM units are quoted separately so the buyer knows exactly what is supplied
- Warranty on genuine and OEM new engines and generator sets is one year or 1000 hours, whichever comes first; parts and repair labour are covered for quality faults inside that period.
Use and Installation Guide
- Quote the model L300-20 when ordering so the correct variant is supplied.
- Match the flywheel housing and clutch to the existing gearbox
- Check the emission level required in the registration market before ordering
- Re-use the vehicle's cooling pack only if it meets the engine's heat rejection
- Keep the warranty terms in mind: one year or 1000 hours, whichever comes first.
Customisation Options
- OEM and ODM builds, including your logo and company name on the unit
- Cummins engine customisation and modification to your requirement
- Mining and special explosion-proof builds
- Genuine or OEM parts specified on the quotation
How It Compares
| Compared with | What to consider |
|---|---|
| A rebuilt or used engine of the same rating | A rebuilt unit may show the same 221 kW (300 HP) on paper, but its running history is unknown and the warranty rarely covers the whole engine. |
| A larger engine in the same Cummins range | Moving up a frame size adds weight, envelope and fuel burn; specify the next size up only if the duty cycle really needs the headroom. |
| A non-Cummins engine of similar output | Parts and service for Cummins families are available in most markets, which matters more over ten years than the purchase price on day one. |
L300-20 Questions
Is this L300-20 a genuine Cummins engine
What power does the L300-20 produce
What warranty comes with the engine
How do I confirm this is the right variant for my machine
How is the engine shipped and what payment terms apply
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Quote The L300-20
Send your serial number or nameplate photograph and we will confirm the configuration, then price genuine and OEM options side by side.