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

Mercedes-Benz Arocs, 375 kW, 4x2 tractor unit vs Volvo FMX, 375 kW, 4x2 tractor unit

Mercedes-Benz Arocs, 375 kW, 4x2 tractor unit

2020–2023 · 375 kW
34.5l/100 km
median; 29.9–40.9 across 47 declared configurations

Volvo FMX, 375 kW, 4x2 tractor unit

2021–2023 · 375 kW
34.3l/100 km
median; 32–40.9 across 24 declared configurations
Mercedes-Benz Arocs, 375 kW, 4x2 tractor unit and Volvo FMX, 375 kW, 4x2 tractor unit side by side
SpecificationMercedes-Benz Arocs, 375 kW, 4x2 tractor unitVolvo FMX, 375 kW, 4x2 tractor unit
Vehicle formTractor unit for semi-trailer (BC)RegisteredTractor unit for semi-trailer (BC)Registered
Axle configuration4×2Declared4×2Declared
Registered new2020–2023Registeredcentral 90% of records2021–2023Registeredcentral 90% of records
Engine power375 kWDeclared375 kWDeclared
Engine displacement12.8 litresDeclared12.8 litresDeclared
GearboxautomatedDeclaredautomatedDeclared
Gross vehicle weight18,000–20,500 kgDeclaredmedian 18,000 kg, across 113 declared configurations20,100–22,000 kgDeclaredmedian 21,000 kg, across 63 declared configurations
Declared fuel, long haul34.5 l/100 km Declaredmedian; 29.9–40.9 l/100 km across 47 declared configurations34.3 l/100 km Declaredmedian; 32–40.9 l/100 km across 24 declared configurations
CO₂ per tonne-km46.81 g Declaredmedian; 40.54–55.5 g46.55 g Declaredmedian; 43.34–55.4 g

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

What the numbers actually say

There is 0.2 l/100 km between these two (0.5%). That is inside the 10% tolerance of declared figures, so on fuel alone neither is the better choice: at 120,000 km a year and an assumed £1.40 a litre the gap would be about 240 litres a year (£336). The declared figures for one of them alone span 11 l/100 km across its configurations, so the specification ordered matters more than the choice between these two.

Arocs, 375 kW, 4x2 tractor unit full specificationFMX, 375 kW, 4x2 tractor unit full specificationThe fuel ranking

Fuel over a year

120,000 km · assumed price
Mercedes-Benz Arocs, 375 kW, 4x2 tractor unit41,400 litres
£57,960 at the assumed price
Volvo FMX, 375 kW, 4x2 tractor unit41,160 litres
£57,624 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.