AllTruckData
Comparison · 4×2 lorry · long haul at 14 t

Mercedes-Benz Arocs, 315 kW, 4x2 rigid lorry vs Volvo FMX, 315 kW, 4x2 rigid lorry

Mercedes-Benz Arocs, 315 kW, 4x2 rigid lorry

2020–2023 · 315 kW
34.5l/100 km
median; 32.3–42 across 13 declared configurations

Volvo FMX, 315 kW, 4x2 rigid lorry

2021–2023 · 315 kW
33.4l/100 km
median; 30.2–44.9 across 37 declared configurations
Mercedes-Benz Arocs, 315 kW, 4x2 rigid lorry and Volvo FMX, 315 kW, 4x2 rigid lorry side by side
SpecificationMercedes-Benz Arocs, 315 kW, 4x2 rigid lorryVolvo FMX, 315 kW, 4x2 rigid lorry
Vehicle formLorry (BA)RegisteredLorry (BA)Registered
Axle configuration4×2Declared4×2Declared
Registered new2020–2023Registeredcentral 90% of records2021–2023Registeredcentral 90% of records
Engine power315 kWDeclared315 kWDeclared
Engine displacement10.7 litresDeclared12.8 litresDeclared
Gearboxautomated, manualDeclaredautomated, automaticDeclared
Gross vehicle weight18,000–22,000 kgDeclaredmedian 19,000 kg, across 65 declared configurations21,000–23,000 kgDeclaredmedian 22,000 kg, across 94 declared configurations
Declared fuel, long haul34.5 l/100 km Declaredmedian; 32.3–42 l/100 km across 13 declared configurations33.4 l/100 km Declaredmedian; 30.2–44.9 l/100 km across 37 declared configurations
CO₂ per tonne-km64.5 g Declaredmedian; 60.5–78.5 g62.45 g Declaredmedian; 56.46–84 g

Fuel and CO₂: long haul at 14 t, 2022 declarations.

What the numbers actually say

There is 1.1 l/100 km between these two (3.2%). 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 1,320 litres a year (£1,848). The declared figures for one of them alone span 14.7 l/100 km across its configurations, so the specification ordered matters more than the choice between these two.

Arocs, 315 kW, 4x2 rigid lorry full specificationFMX, 315 kW, 4x2 rigid lorry full specificationThe fuel ranking

Fuel over a year

120,000 km · assumed price
Mercedes-Benz Arocs, 315 kW, 4x2 rigid lorry41,400 litres
£57,960 at the assumed price
Volvo FMX, 315 kW, 4x2 rigid lorry40,080 litres
£56,112 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.