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

Volvo FM, 345 kW, 4x2 rigid lorry, 12.8 L (2019–2023) vs Volvo FMX, 345 kW, 4x2 rigid lorry, 10.8 L (2021–2023)

Volvo FM, 345 kW, 4x2 rigid lorry, 12.8 L (2019–2023)

2019–2023 · 345 kW
32.2l/100 km
median; 28.9–44.4 across 19 declared configurations

Volvo FMX, 345 kW, 4x2 rigid lorry, 10.8 L (2021–2023)

2021–2023 · 345 kW
30.7l/100 km
median; 30.7–32 across 2 declared configurations
Volvo FM, 345 kW, 4x2 rigid lorry, 12.8 L (2019–2023) and Volvo FMX, 345 kW, 4x2 rigid lorry, 10.8 L (2021–2023) side by side
SpecificationVolvo FM, 345 kW, 4x2 rigid lorry, 12.8 L (2019–2023)Volvo FMX, 345 kW, 4x2 rigid lorry, 10.8 L (2021–2023)
Vehicle formLorry (BA)RegisteredLorry (BA)Registered
Axle configuration4×2Declared4×2Declared
Registered new2019–2023Registeredcentral 90% of records2021–2023Registeredcentral 90% of records
Engine power345 kWDeclared345 kWDeclared
Engine displacement12.8 litresDeclared10.8 litresDeclared
Gearboxautomated, automaticDeclaredautomatedDeclared
Gross vehicle weight19,000–23,000 kgDeclaredmedian 21,000 kg, across 129 declared configurations21,000–23,000 kgDeclaredmedian 22,000 kg, across 8 declared configurations
Declared fuel, long haul32.2 l/100 km Declaredmedian; 28.9–44.4 l/100 km across 19 declared configurations30.7 l/100 km Declaredmedian; 30.7–32 l/100 km across 2 declared configurations
CO₂ per tonne-km60.2 g Declaredmedian; 53.93–82.93 g57.34 g Declaredmedian; 57.34–59.74 g

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

What the numbers actually say

There is 1.5 l/100 km between these two (4.8%). 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 1,800 litres a year (£2,520). The declared figures for one of them alone span 15.5 l/100 km across its configurations, so the specification ordered matters more than the choice between these two.

FM, 345 kW, 4x2 rigid lorry, 12.8 L (2019–2023) full specificationFMX, 345 kW, 4x2 rigid lorry, 10.8 L (2021–2023) full specificationThe fuel ranking

Fuel over a year

120,000 km · assumed price
Volvo FM, 345 kW, 4x2 rigid lorry, 12.8 L (2019–2023)38,640 litres
£54,096 at the assumed price
Volvo FMX, 345 kW, 4x2 rigid lorry, 10.8 L (2021–2023)36,840 litres
£51,576 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.