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

Mercedes-Benz Arocs, 375 kW, 4x2 rigid lorry vs Volvo FM, 375 kW, 4x2 rigid lorry

Mercedes-Benz Arocs, 375 kW, 4x2 rigid lorry

2020–2023 · 375 kW
34.8l/100 km
median; 33.4–36.4 across 5 declared configurations
Lower declared fuel

Volvo FM, 375 kW, 4x2 rigid lorry

2019–2023 · 375 kW
30.8l/100 km
median; 28.8–33.9 across 11 declared configurations
Mercedes-Benz Arocs, 375 kW, 4x2 rigid lorry and Volvo FM, 375 kW, 4x2 rigid lorry side by side
SpecificationMercedes-Benz Arocs, 375 kW, 4x2 rigid lorryVolvo FM, 375 kW, 4x2 rigid lorry
Vehicle formLorry (BA)RegisteredLorry (BA)Registered
Axle configuration4×2Declared4×2Declared
Registered new2020–2023Registeredcentral 90% of records2019–2023Registeredcentral 90% of records
Engine power375 kWDeclared375 kWDeclared
Engine displacement12.8 litresDeclared12.8 litresDeclared
GearboxautomatedDeclaredautomatedDeclared
Gross vehicle weight18,000–22,000 kgDeclaredmedian 18,000 kg, across 14 declared configurations19,500–23,000 kgDeclaredmedian 21,000 kg, across 56 declared configurations
Declared fuel, long haul34.8 l/100 km Declaredmedian; 33.4–36.4 l/100 km across 5 declared configurations30.8 l/100 km Declaredmedian; 28.8–33.9 l/100 km across 11 declared configurations
CO₂ per tonne-km65.1 g Declaredmedian; 62.41–68 g57.62 g Declaredmedian; 53.85–63.4 g

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

What the numbers actually say

The Volvo FM, 375 kW, 4x2 rigid lorry declared 4 l/100 km less (12.9%) 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 4,800 litres a year, or £6,720. A gap this size is outside the 10% tolerance of declared figures.

Fuel over a year

120,000 km · assumed price
Mercedes-Benz Arocs, 375 kW, 4x2 rigid lorry41,760 litres
£58,464 at the assumed price
Volvo FM, 375 kW, 4x2 rigid lorry36,960 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.