Power in a compact package

With a highly compact envelope and low weight, the B4.5 achieves outstanding levels of power density to offer a significant installation advantage, together with an enhanced engine management system that seamlessly integrates into the vehicle controls. Perhaps no other four-cylinder engine has established such a reputation for unsurpassed durability in both truck and bus applications worldwide.

• VGT^® Turbo: Cummins Variable Geometry Turbocharger enables high torque from lower engine speeds to enhance vehicle driveability. 
• Hybrid adapted: H versions of the B4.5 are specially configured for buses to integrate with hybrid drivelines, able to significantly reduce fuel consumption and CO2
• HPCR:  Highly efficient High Pressure Common Rail fuel system realizes the full potential of the 4.5-litre engine to deliver rapid response on a highly fuel-efficient basis. 
• Smart electronics: Provides easy access to engine diagnostics and trip data, together with telematics capability.
• Low carbon fuel: Compatible with HVO renewable fuel and B20 biodiesel without engine modification.
• DPF/SCR: Diesel Particulate Filter and Selective Catalytic Reduction exhaust aftertreatment is purpose-designed by Cummins as an engine-integrated emissions control system.
• Global platform: Available in versions to meet all emission standards worldwide.