AllTruckData
Comparison · 8×4 lorry · construction at 12.9 t

Volvo FM, 345 kW, 8x4 rigid lorry, 12.8 L (2015–2024) vs Volvo FMX, 345 kW, 8x4 rigid lorry, 10.8 L (2021–2023)

Volvo FM, 345 kW, 8x4 rigid lorry, 12.8 L (2015–2024)

2015–2024 · 345 kW
42.6l/100 km
median; 39.2–46.5 across 38 declared configurations

Volvo FMX, 345 kW, 8x4 rigid lorry, 10.8 L (2021–2023)

2021–2023 · 345 kW
41.2l/100 km
median; 40.6–44.5 across 14 declared configurations
Volvo FM, 345 kW, 8x4 rigid lorry, 12.8 L (2015–2024) and Volvo FMX, 345 kW, 8x4 rigid lorry, 10.8 L (2021–2023) side by side
SpecificationVolvo FM, 345 kW, 8x4 rigid lorry, 12.8 L (2015–2024)Volvo FMX, 345 kW, 8x4 rigid lorry, 10.8 L (2021–2023)
Vehicle formLorry (BA)RegisteredLorry (BA)Registered
Axle configuration8×4Declared8×4Declared
Registered new2015–2024Registeredcentral 90% of records2021–2023Registeredcentral 90% of records
Engine power345 kWDeclared345 kWDeclared
Engine displacement12.8 litresDeclared10.8 litresDeclared
Gearboxautomated, automaticDeclaredautomatedDeclared
Emission classEEV K, EURO 6, EURO V, EURO VI, EURO VI B, EURO VI C, EURO VI D, EURO VI ERegisteredNot recorded
Gross vehicle weight34,000–46,000 kgRegisteredmedian 43,000 kg, over 243 registrations36,000–40,000 kgDeclaredmedian 40,000 kg, across 39 declared configurations
Kerb weight10,947–43,600 kgRegisteredmedian 17,485 kg, over 243 registrationsNot recorded
Wheelbase4,000–7,800 mmRegisteredmedian 6,450 mm, over 243 registrationsNot recorded
Overall length8,200–14,200 mmRegisteredmedian 9,280 mm, over 243 registrationsNot recorded
Overall height3,130–4,000 mmRegisteredmedian 3,750 mm, over 68 registrationsNot recorded
Declared fuel, construction42.6 l/100 km Declaredmedian; 39.2–46.5 l/100 km across 38 declared configurations41.2 l/100 km Declaredmedian; 40.6–44.5 l/100 km across 14 declared configurations
CO₂ per tonne-km86.34 g Declaredmedian; 79.54–94.33 g83.64 g Declaredmedian; 82.27–90.3 g

Fuel and CO₂: construction at 12.9 t, 2022 declarations.

What the numbers actually say

There is 1.4 l/100 km between these two (3.3%). 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 1,680 litres a year (£2,352). The declared figures for one of them alone span 7.3 l/100 km across its configurations, so the specification ordered matters more than the choice between these two.

FM, 345 kW, 8x4 rigid lorry, 12.8 L (2015–2024) full specificationFMX, 345 kW, 8x4 rigid lorry, 10.8 L (2021–2023) full specificationThe fuel ranking

Fuel over a year

120,000 km · assumed price
Volvo FM, 345 kW, 8x4 rigid lorry, 12.8 L (2015–2024)51,120 litres
£71,568 at the assumed price
Volvo FMX, 345 kW, 8x4 rigid lorry, 10.8 L (2021–2023)49,440 litres
£69,216 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.