A conversation with the Volvo Trucks product marketing manager about fuel efficiency in the all-new VNR
Q: The new VNR is up to 7.5% more fuel efficient than the legacy model. Take us through the enhancements to the aerodynamics.
A: “The first thing you see are the aerodynamic improvements. It starts with the wedge-shaped body that allows air to travel more easily around the cab. The windshield is raked and curve creating a seamless transition from hood to roof. And that angled roofline is available in three heights to maximize the aerodynamic profile your specific application requires.
“Because the truck is designed to cut through the air, we’ve reduced the amount of horsepower needed to pull a load. The improved aerodynamics contribute about 60% of the overall fuel efficiency gains.”
“The improved aerodynamics contribute about 60% of the overall fuel efficiency gains.”
Q: There’s lots to talk about in the area of powertrain when it comes to the new VNR as well.
A: “We’ll offer the new Volvo D13 Variable Geometry Turbo (VGT) engine standard in VNR models. The D13 VGT engine builds on the improvements launched with the D13 Turbo Compound (TC) engine in 2024. The D13 TC will also be offered for the VNR. The D13 VGT and TC engines will be available a range of configurations, offering 405-455 hp and 1450-1850 lb.-ft of torque.
“Both of these D13 engine options feature a new 7-wave piston that disperses heat more effectively, improving combustion and reducing nitrous oxide (NOx). Add in faster shifting speeds for a 30% improvement in shifting efficiency, and the VNR’s powertrain is able to help the engine stays in its “sweet spot” longer, further maximizing fuel economy.”
Q: There will be three torque packages available, which customers are going to benefit from the different torque options in the VNR powertrain?
First let’s consider Super Direct.
A: “The Super Direct package is well-suited for inner-city and regional operations where vehicles run at slower speeds with frequent starts and stops. Super Direct delivers greater startability, making it a strong fit for routes requiring responsive low-speed performance and smooth acceleration in urban environments. Fleets focused on efficiency, simplicity, and consistent stop-and-go drivability will benefit from this configuration.”
Our next option is Straight Torque.
A: “This package is Ideal for customers who place a stronger focus on performance, or who operate with higher GCWs and in more demanding terrain. When paired with an overdrive transmission and higher numeric rear axle ratios, it delivers excellent startability, gradeability, and pulling power. Straight Torque is a dependable option for fleets that prioritize power, drivability, and capability over fuel economy in challenging operating conditions.”
Finally, we’ll look at I-Torque because of its versatility.
A: “It’s ideal for customers operating in long-haul and regional applications with varied terrain and speeds. I-Torque’s combination of turbo compounding, downspeeding, and intelligent shifting provides exceptional fuel efficiency and drivability. It’s extremely versatile, delivering strong performance and fuel savings in both low-speed regional routes and highway linehaul operations. I-Torque is perfect for fleets seeking a solution that adapts to a wide range of duty cycles without compromising efficiency.
Spotlight on the D13 VGT Engine
Q: The new VNR will come standard with a Volvo D13 VGT engine. Why is it a great solution for local and regional haul applications?
A: “The Volvo D13 with Variable Geometry Turbo (VGT) delivers a strong balance of power, responsiveness, and fuel efficiency, making it ideal for both regional haul and long haul operations. The engine’s VGT technology ensures precise control of boost pressure, enabling quick throttle response and optimized engine braking — especially useful in stop-and-go regional routes and grade-heavy highway driving.
“With multiple horsepower and torque ratings, the D13 VGT Engine allows fleets to tailor performance to their specific duty cycle.”
“This maximizes payload in regional delivery, while still allowing for efficient cruising on interstates. The D13 VGT is also approximately 130 pounds lighter than the D13 Turbo Compound engine, offering a weight advantage that can translate to greater payload capacity and improved operational efficiency for weight-sensitive routes.
Its proven durability, low operating costs, and advanced fuel management systems make the D13 VGT a dependable, cost-effective solution for fleets needing a versatile and efficient powertrain across diverse applications.”