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

Volvo FM, 323 kW, 4x2 rigid lorry vs Volvo FMX, 323 kW, 4x2 rigid lorry

Volvo FM, 323 kW, 4x2 rigid lorry

2019–2023 · 323 kW
30.9l/100 km
median; 28.6–42 across 27 declared configurations

Volvo FMX, 323 kW, 4x2 rigid lorry

2022–2023 · 323 kW
30.4l/100 km
median; 29.7–32.3 across 11 declared configurations
Volvo FM, 323 kW, 4x2 rigid lorry and Volvo FMX, 323 kW, 4x2 rigid lorry side by side
SpecificationVolvo FM, 323 kW, 4x2 rigid lorryVolvo FMX, 323 kW, 4x2 rigid lorry
Vehicle formLorry (BA)RegisteredLorry (BA)Registered
Axle configuration4×2Declared4×2Declared
Registered new2019–2023Registeredcentral 90% of records2022–2023Registeredcentral 90% of records
Engine power323 kWDeclared323 kWDeclared
Engine displacement10.8 litresDeclared10.8 litresDeclared
Gearboxautomated, automaticDeclaredautomated, automaticDeclared
Gross vehicle weight19,500–23,000 kgDeclaredmedian 22,000 kg, across 133 declared configurations21,000–23,000 kgDeclaredmedian 21,000 kg, across 23 declared configurations
Declared fuel, long haul30.9 l/100 km Declaredmedian; 28.6–42 l/100 km across 27 declared configurations30.4 l/100 km Declaredmedian; 29.7–32.3 l/100 km across 11 declared configurations
CO₂ per tonne-km57.71 g Declaredmedian; 53.5–78.6 g56.81 g Declaredmedian; 55.44–60.5 g

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

What the numbers actually say

There is 0.5 l/100 km between these two (1.6%). 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 600 litres a year (£840). The declared figures for one of them alone span 13.4 l/100 km across its configurations, so the specification ordered matters more than the choice between these two.

FM, 323 kW, 4x2 rigid lorry full specificationFMX, 323 kW, 4x2 rigid lorry full specificationThe fuel ranking

Fuel over a year

120,000 km · assumed price
Volvo FM, 323 kW, 4x2 rigid lorry37,080 litres
£51,912 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.