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

Mercedes-Benz Arocs, 315 kW, 4x2 rigid lorry vs Volvo FMX, 323 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
Lower declared fuel

Volvo FMX, 323 kW, 4x2 rigid lorry

2022–2023 · 323 kW
30.4l/100 km
median; 29.7–32.3 across 11 declared configurations
Mercedes-Benz Arocs, 315 kW, 4x2 rigid lorry and Volvo FMX, 323 kW, 4x2 rigid lorry side by side
SpecificationMercedes-Benz Arocs, 315 kW, 4x2 rigid lorryVolvo FMX, 323 kW, 4x2 rigid lorry
Vehicle formLorry (BA)RegisteredLorry (BA)Registered
Axle configuration4×2Declared4×2Declared
Registered new2020–2023Registeredcentral 90% of records2022–2023Registeredcentral 90% of records
Engine power315 kWDeclared323 kWDeclared
Engine displacement10.7 litresDeclared10.8 litresDeclared
Gearboxautomated, manualDeclaredautomated, automaticDeclared
Gross vehicle weight18,000–22,000 kgDeclaredmedian 19,000 kg, across 65 declared configurations21,000–23,000 kgDeclaredmedian 21,000 kg, across 23 declared configurations
Declared fuel, long haul34.5 l/100 km Declaredmedian; 32.3–42 l/100 km across 13 declared configurations30.4 l/100 km Declaredmedian; 29.7–32.3 l/100 km across 11 declared configurations
CO₂ per tonne-km64.5 g Declaredmedian; 60.5–78.5 g56.81 g Declaredmedian; 55.44–60.5 g

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

What the numbers actually say

The Volvo FMX, 323 kW, 4x2 rigid lorry declared 4.1 l/100 km less (13.4%) on the long haul at 14 t, 2022 declarations. At 120,000 km a year and an assumed £1.40 a litre, that is about 4,920 litres a year, or £6,888. A gap this size is outside the 10% tolerance of declared figures.

Arocs, 315 kW, 4x2 rigid lorry full specificationFMX, 323 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, 323 kW, 4x2 rigid lorry36,480 litres
£51,072 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.