Cummins QSL9 Fully Reconditioned Engine

Cummins QSL9 Euro 5 | 9.0L On-Highway Diesel Engine

The Cummins QSL9 is a modern 9-litre, inline six-cylinder, four-stroke diesel engine engineered for efficient, reliable on-highway operation. Featuring high-pressure common-rail fuel injection, it delivers clean, quiet performance with strong low-end torque and excellent driveability, making it a proven choice for buses and coaches operating in both stop-start urban conditions and sustained highway service.

Engine Overview

With a displacement of approximately 8.9 litres, a 114 mm bore and 145 mm stroke, the QSL9 offers a compact installation footprint while maintaining high power density and a broad, usable torque curve. The turbocharged and aftercooled induction system, combined with a 24-valve cylinder head and advanced electronic controls, optimises fuel efficiency and throttle response while meeting stringent Euro 5 emissions requirements.

Key Selling Points

Inline six-cylinder, 8.9-litre, turbocharged and aftercooled diesel engine designed for heavy-duty commercial applications.

High-pressure common-rail fuel system providing smooth power delivery, reduced engine noise, and improved cold-start performance.

Proven reliability across global bus and truck fleets, supported by long service intervals and strong Cummins parts and service availability worldwide.