Gregory goes for gas

South-west logistics giant Gregory Distribution is running seven LNG-powered Volvo tractors units in a trial to test the viability of replacing diesel with natural gas across its 1000-strong fleet.

Gregory is deploying the seven trucks on high-mileage contracts covering between 150,000 to 250,000 km per annum from its Bristol site.

The new vehicles have been supplied on a five-year Volvo Financial Services contract hire deal which incorporates a Volvo Gold Contract repair and maintenance package, supported by a 100 per cent uptime promise. All scheduled servicing and maintenance will be carried out at Wales and West Truck and Bus in Avonmouth.

Gregory’s 6×2 pusher-axle tractor units have been specified with 155 kg LNG tanks for maximum range, and benefit from 12-speed I-Shift automated gearboxes to help maximise fuel efficiency.

Key to securing the order against a competitor’s gas truck was Volvo’s approach to natural gas engine technology, using small amounts of diesel to initiate ignition of the air-fuel mixture in place of spark-plugs, and retaining the high compression-ratio of the diesel engine.

This enables the Volvo G13C engine to deliver the same 460 hp and 2,300 Nm of torque as its diesel-only counterpart, says the firm, with matching driveability, reliability and service intervals. Volvo’s gas powertrain provides engine braking just like a regular diesel – and without requiring a separate retarder which adds weight and complexity.

Andrew Chapple, head of fleet, property and procurement for Gregory Distribution, said: “Initially we began exploring LNG as a way of reducing our carbon footprint, but the business case is also very strong and we’re confident they will help us to reduce total cost of ownership thanks to lower fuel costs.”