AllTruckData
Comparison · 4×2 tractor unit · long haul at 19.3 t

Mercedes-Benz Arocs, 350 kW, 4x2 tractor unit vs Volvo FM, 345 kW, 4x2 tractor unit, 10.8 L (2019–2023)

Mercedes-Benz Arocs, 350 kW, 4x2 tractor unit

2020–2023 · 350 kW
35.6l/100 km
median; 32.1–39.5 across 31 declared configurations
Lower declared fuel

Volvo FM, 345 kW, 4x2 tractor unit, 10.8 L (2019–2023)

2019–2023 · 345 kW
30.8l/100 km
median; 28.2–36.9 across 65 declared configurations
Mercedes-Benz Arocs, 350 kW, 4x2 tractor unit and Volvo FM, 345 kW, 4x2 tractor unit, 10.8 L (2019–2023) side by side
SpecificationMercedes-Benz Arocs, 350 kW, 4x2 tractor unitVolvo FM, 345 kW, 4x2 tractor unit, 10.8 L (2019–2023)
Vehicle formTractor unit for semi-trailer (BC)RegisteredTractor unit for semi-trailer (BC)Registered
Axle configuration4×2Declared4×2Declared
Registered new2020–2023Registeredcentral 90% of records2019–2023Registeredcentral 90% of records
Engine power350 kWDeclared345 kWDeclared
Engine displacement12.8 litresDeclared10.8 litresDeclared
Gearboxautomated, manualDeclaredautomatedDeclared
Emission classNot recordedEURO 6, EURO VI D, EURO VI ERegistered
Gross vehicle weight18,000–20,500 kgDeclaredmedian 18,000 kg, across 114 declared configurations19,100–22,000 kgRegisteredmedian 19,500 kg, across 18 type-approval versions and 3 records without one
Kerb weightNot recorded6,331–7,538 kgRegisteredmedian 6,928 kg, over 36 registrations
WheelbaseNot recorded3,500–3,810 mmRegisteredmedian 3,800 mm, over 36 registrations
Overall lengthNot recorded5,690–5,990 mmRegisteredmedian 5,990 mm, over 36 registrations
Overall heightNot recorded2,890–3,630 mmRegisteredmedian 3,370 mm, over 24 registrations
Declared fuel, long haul35.6 l/100 km Declaredmedian; 32.1–39.5 l/100 km across 31 declared configurations30.8 l/100 km Declaredmedian; 28.2–36.9 l/100 km across 65 declared configurations
CO₂ per tonne-km48.2 g Declaredmedian; 43.55–53.6 g41.78 g Declaredmedian; 38.3–50.05 g

Fuel and CO₂: long haul at 19.3 t, 2022 declarations.

What the numbers actually say

The Volvo FM, 345 kW, 4x2 tractor unit, 10.8 L (2019–2023) declared 4.8 l/100 km less (15.5%) on the long haul at 19.3 t, 2022 declarations. At 120,000 km a year and an assumed £1.40 a litre, that is about 5,760 litres a year, or £8,064. A gap this size is outside the 10% tolerance of declared figures.

Arocs, 350 kW, 4x2 tractor unit full specificationFM, 345 kW, 4x2 tractor unit, 10.8 L (2019–2023) full specificationThe fuel ranking

Fuel over a year

120,000 km · assumed price
Mercedes-Benz Arocs, 350 kW, 4x2 tractor unit42,720 litres
£59,808 at the assumed price
Volvo FM, 345 kW, 4x2 tractor unit, 10.8 L (2019–2023)36,960 litres
£51,744 at the assumed price
At 120,000 km a year and an assumed £1.40 a litre; the price is an assumption, not one we track.