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

Volvo FM, 315 kW, 6x4 rigid lorry vs Volvo FMX, 315 kW, 6x4 rigid lorry

Volvo FM, 315 kW, 6x4 rigid lorry

2020–2023 · 315 kW
36.9l/100 km
median; 34.7–43.2 across 11 declared configurations

Volvo FMX, 315 kW, 6x4 rigid lorry

2021–2023 · 315 kW
39.6l/100 km
median; 36.3–42.3 across 15 declared configurations
Volvo FM, 315 kW, 6x4 rigid lorry and Volvo FMX, 315 kW, 6x4 rigid lorry side by side
SpecificationVolvo FM, 315 kW, 6x4 rigid lorryVolvo FMX, 315 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 power315 kWDeclared315 kWDeclared
Engine displacement12.8 litresDeclared12.8 litresDeclared
Gearboxautomated, automaticDeclaredautomatedDeclared
Gross vehicle weight28,500–36,000 kgDeclaredmedian 30,000 kg, across 89 declared configurations29,000–36,000 kgDeclaredmedian 32,000 kg, across 43 declared configurations
Declared fuel, long haul36.9 l/100 km Declaredmedian; 34.7–43.2 l/100 km across 11 declared configurations39.6 l/100 km Declaredmedian; 36.3–42.3 l/100 km across 15 declared configurations
CO₂ per tonne-km50.07 g Declaredmedian; 47.09–58.6 g53.7 g Declaredmedian; 49.16–57.3 g

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

What the numbers actually say

There is 2.7 l/100 km between these two (7.3%). 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 3,240 litres a year (£4,536). The declared figures for one of them alone span 8.5 l/100 km across its configurations, so the specification ordered matters more than the choice between these two.

FM, 315 kW, 6x4 rigid lorry full specificationFMX, 315 kW, 6x4 rigid lorry full specificationThe fuel ranking

Fuel over a year

120,000 km · assumed price
Volvo FM, 315 kW, 6x4 rigid lorry44,280 litres
£61,992 at the assumed price
Volvo FMX, 315 kW, 6x4 rigid lorry47,520 litres
£66,528 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.