Comparison · 6×2 lorry · long haul at 19.3 t

Volvo FMX, 345 kW, 6x2 rigid lorry, 10.8 L (2021–2023) vs Volvo FMX, 345 kW, 6x2 rigid lorry, 12.8 L (2021–2023)

Volvo FMX, 345 kW, 6x2 rigid lorry, 10.8 L (2021–2023)

2021–2023 · 345 kW
35.5l/100 km
median; 32.6–40.4 across 15 declared configurations

Volvo FMX, 345 kW, 6x2 rigid lorry, 12.8 L (2021–2023)

2021–2023 · 345 kW
35.8l/100 km
median; 32.7–40.5 across 77 declared configurations
Volvo FMX, 345 kW, 6x2 rigid lorry, 10.8 L (2021–2023) and Volvo FMX, 345 kW, 6x2 rigid lorry, 12.8 L (2021–2023) side by side
SpecificationVolvo FMX, 345 kW, 6x2 rigid lorry, 10.8 L (2021–2023)Volvo FMX, 345 kW, 6x2 rigid lorry, 12.8 L (2021–2023)
Vehicle formLorry (BA)RegisteredLorry (BA)Registered
Axle configuration6×2Declared6×2Declared
Registered new2021–2023Registeredcentral 90% of records2021–2023Registeredcentral 90% of records
Engine power345 kWDeclared345 kWDeclared
Engine displacement10.8 litresDeclared12.8 litresDeclared
Gearboxautomated, automaticDeclaredautomatedDeclared
Gross vehicle weight27,000–33,000 kgDeclaredmedian 28,000 kg, across 44 declared configurations27,000–33,000 kgDeclaredmedian 28,000 kg, across 212 declared configurations
Declared fuel, long haul35.5 l/100 km Declaredmedian; 32.6–40.4 l/100 km across 15 declared configurations35.8 l/100 km Declaredmedian; 32.7–40.5 l/100 km across 77 declared configurations
CO₂ per tonne-km48.13 g Declaredmedian; 44.17–54.8 g48.5 g Declaredmedian; 44.32–54.9 g

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

What the numbers actually say

There is 0.3 l/100 km between these two (0.8%). 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 360 litres a year (£504). The declared figures for one of them alone span 7.8 l/100 km across its configurations, so the specification ordered matters more than the choice between these two.

Fuel over a year

120,000 km · assumed price
Volvo FMX, 345 kW, 6x2 rigid lorry, 10.8 L (2021–2023)42,600 litres
£59,640 at the assumed price
Volvo FMX, 345 kW, 6x2 rigid lorry, 12.8 L (2021–2023)42,960 litres
£60,144 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.