Westport and Volvo Showcase 500-HP Natural Gas Engine with Diesel-Level Efficiency

Key Details Westport and Volvo's joint venture Cespira is debuting a high-pressure CNG fuel system at the Advanced Clean Transportation Expo in Las Vegas this May. The system pairs compressed natural gas storage with Cespira's HPDI (High Pressure Direct Injection) technology on a Volvo VNL 300 truck producing 500 horsepower and 1,850 lb-ft of torque. How It Works HPDI technology uses compression ignition with a small amount of injected ignition fuel, eliminating the need for spark plugs. The system requires only modifications to the HPDI injectors and fuel system, with no changes needed to the engine, transmission, cooling system, or maintenance schedules. Why It Matters Fleets can achieve up to 10 mpg equivalent fuel efficiency on CNG or renewable natural gas (RNG), matching diesel performance while offering a driving range exceeding 600 miles. CNG prices remain lower and more stable than volatile diesel costs. The technology also opens a pathway for future hydrogen fuel adoption, positioning operators for cleaner alternatives without major infrastructure investments. Next Steps Cespira closed its formation in July 2024 and aims to partner with multiple original equipment manufacturers. This North American demonstration marks a critical milestone for HPDI adoption in the heavy-duty trucking market.