AllTruckData
Comparison · 6×4 lorry · long haul at 19.3 t

Volvo FM, 323 kW, 6x4 rigid lorry vs Volvo FMX, 323 kW, 6x4 rigid lorry

Volvo FM, 323 kW, 6x4 rigid lorry

2020–2023 · 323 kW
38.6l/100 km
median; 35.3–42.6 across 12 declared configurations

Volvo FMX, 323 kW, 6x4 rigid lorry

2021–2023 · 323 kW
36.7l/100 km
median; 35.1–43.1 across 12 declared configurations
Volvo FM, 323 kW, 6x4 rigid lorry and Volvo FMX, 323 kW, 6x4 rigid lorry side by side
SpecificationVolvo FM, 323 kW, 6x4 rigid lorryVolvo FMX, 323 kW, 6x4 rigid lorry
Vehicle formLorry (BA)RegisteredLorry (BA)Registered
Axle configuration6×4Declared6×4Declared
Registered new2020–2023Registeredcentral 90% of records2021–2023Registeredcentral 90% of records
Engine power323 kWDeclared323 kWDeclared
Engine displacement10.8 litresDeclared10.8 litresDeclared
Gearboxautomated, automaticDeclaredautomated, automaticDeclared
Gross vehicle weight29,000–35,000 kgDeclaredmedian 30,000 kg, across 56 declared configurations28,500–32,000 kgDeclaredmedian 31,000 kg, across 34 declared configurations
Declared fuel, long haul38.6 l/100 km Declaredmedian; 35.3–42.6 l/100 km across 12 declared configurations36.7 l/100 km Declaredmedian; 35.1–43.1 l/100 km across 12 declared configurations
CO₂ per tonne-km52.36 g Declaredmedian; 47.82–57.8 g49.74 g Declaredmedian; 47.65–58.4 g

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

What the numbers actually say

There is 1.9 l/100 km between these two (5.1%). 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 2,280 litres a year (£3,192). The declared figures for one of them alone span 8 l/100 km across its configurations, so the specification ordered matters more than the choice between these two.

FM, 323 kW, 6x4 rigid lorry full specificationFMX, 323 kW, 6x4 rigid lorry full specificationThe fuel ranking

Fuel over a year

120,000 km · assumed price
Volvo FM, 323 kW, 6x4 rigid lorry46,320 litres
£64,848 at the assumed price
Volvo FMX, 323 kW, 6x4 rigid lorry44,040 litres
£61,656 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.