Volvo Trucks launches stop/start engine tech to save fuel and CO2

Volvo Trucks has introduced a new generation of its I-Roll technology, adding an engine stop/start functionality – said to be a world first in the heavy-duty truck industry.

The new stop/start function claims to cut fuel consumption and CO2 emissions.

Volvo Trucks cites its recent victory in the 2025 Green Truck Award test with the Volvo FH Aero, as proof that its latest technologies and innovations have a real impact on fuel efficiency.

The new Aero cab that was introduced in 2024 and the further aerodynamic improvements since then pay off in terms of significant fuel consumption and CO2 emission reductions.

The latest addition in Volvo’s striving for fuel savings is developed in-house at Volvo and is based on the company’s existing I-See and I-Roll technologies.

The new stop/start engine feature is enabled by constantly monitoring road data and road curvature information. The engine will be turned off temporarily when an oncoming downward slope is identified along the route. While the engine is turned off, zero fuel will be consumed and consequently, there will be no CO2 tailpipe emissions.

The new engine stop/start functionality is activated at speeds above 60 km/h. Depending on enabling conditions such as topography and ambient temperature, the new I-Roll with Engine stop/start will be able to cut up to one percent of fuel and CO2 emissions on top of already achieved savings.

The new feature will be offered on the Volvo FH and FH Aero with 13-litre diesel engine and customers can order it from November 2025.