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

Volvo FM, 345 kW, 8x4 rigid lorry, 10.8 L (2020–2024) vs Volvo FMX, 345 kW, 8x4 rigid lorry, 12.8 L (2021–2023)

Volvo FM, 345 kW, 8x4 rigid lorry, 10.8 L (2020–2024)

2020–2024 · 345 kW
42.9l/100 km
median; 38.6–44.6 across 16 declared configurations

Volvo FMX, 345 kW, 8x4 rigid lorry, 12.8 L (2021–2023)

2021–2023 · 345 kW
43.7l/100 km
median; 38.8–47.5 across 80 declared configurations
Volvo FM, 345 kW, 8x4 rigid lorry, 10.8 L (2020–2024) and Volvo FMX, 345 kW, 8x4 rigid lorry, 12.8 L (2021–2023) side by side
SpecificationVolvo FM, 345 kW, 8x4 rigid lorry, 10.8 L (2020–2024)Volvo FMX, 345 kW, 8x4 rigid lorry, 12.8 L (2021–2023)
Vehicle formLorry (BA)RegisteredLorry (BA)Registered
Axle configuration8×4Declared8×4Declared
Registered new2020–2024Registeredcentral 90% of records2021–2023Registeredcentral 90% of records
Engine power345 kWDeclared345 kWDeclared
Engine displacement10.8 litresDeclared12.8 litresDeclared
Gearboxautomated, automaticDeclaredautomatedDeclared
Emission classEURO VI D, EURO VI ERegisteredEURO VI ERegistered
Gross vehicle weight37,000–44,000 kgRegisteredmedian 42,000 kg, over 7 registrations41,000–46,000 kgRegisteredmedian 43,000 kg, over 5 registrations
Kerb weight13,653–38,850 kgRegisteredmedian 16,906 kg, over 7 registrations15,457–18,184 kgRegisteredmedian 17,145 kg, over 5 registrations
Wheelbase5,720–7,050 mmRegisteredmedian 6,470 mm, over 7 registrations5,670–6,850 mmRegisteredmedian 6,470 mm, over 5 registrations
Overall length8,800–11,450 mmRegisteredmedian 9,130 mm, over 7 registrations8,590–9,450 mmRegisteredmedian 9,070 mm, over 5 registrations
Overall height3,070–3,950 mmRegisteredmedian 3,380 mm, over 5 registrations3,330–3,830 mmRegisteredmedian 3,720 mm, over 4 registrations
Declared fuel, construction42.9 l/100 km Declaredmedian; 38.6–44.6 l/100 km across 16 declared configurations43.7 l/100 km Declaredmedian; 38.8–47.5 l/100 km across 80 declared configurations
CO₂ per tonne-km87.1 g Declaredmedian; 78.25–90.4 g88.64 g Declaredmedian; 78.7–96.44 g

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

What the numbers actually say

There is 0.8 l/100 km between these two (1.8%). 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 960 litres a year (£1,344). The declared figures for one of them alone span 8.7 l/100 km across its configurations, so the specification ordered matters more than the choice between these two.

FM, 345 kW, 8x4 rigid lorry, 10.8 L (2020–2024) full specificationFMX, 345 kW, 8x4 rigid lorry, 12.8 L (2021–2023) full specificationThe fuel ranking

Fuel over a year

120,000 km · assumed price
Volvo FM, 345 kW, 8x4 rigid lorry, 10.8 L (2020–2024)51,480 litres
£72,072 at the assumed price
Volvo FMX, 345 kW, 8x4 rigid lorry, 12.8 L (2021–2023)52,440 litres
£73,416 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.