AllTruckData
Comparison · 6×4 tractor unit · long haul at 19.3 t

Volvo FH, 413 kW, 6x4 tractor unit vs Volvo FMX, 405 kW, 6x4 tractor unit

Volvo FH, 413 kW, 6x4 tractor unit

2020–2023 · 413 kW
41.3l/100 km
median; 36.3–44.9 across 8 declared configurations

Volvo FMX, 405 kW, 6x4 tractor unit

2021–2023 · 405 kW
39.5l/100 km
median; 35.3–44.5 across 8 declared configurations
Volvo FH, 413 kW, 6x4 tractor unit and Volvo FMX, 405 kW, 6x4 tractor unit side by side
SpecificationVolvo FH, 413 kW, 6x4 tractor unitVolvo FMX, 405 kW, 6x4 tractor unit
Vehicle formTractor unit for semi-trailer (BC)RegisteredTractor unit for semi-trailer (BC)Registered
Axle configuration6×4Declared6×4Declared
Registered new2020–2023Registeredcentral 90% of records2021–2023Registeredcentral 90% of records
Engine power413 kWDeclared405 kWDeclared
Engine displacement16.1 litresDeclared12.8 litresDeclared
GearboxautomatedDeclaredautomatedDeclared
Gross vehicle weight29,000–36,000 kgDeclaredmedian 35,000 kg, across 28 declared configurations28,500–36,000 kgDeclaredmedian 32,000 kg, across 19 declared configurations
Declared fuel, long haul41.3 l/100 km Declaredmedian; 36.3–44.9 l/100 km across 8 declared configurations39.5 l/100 km Declaredmedian; 35.3–44.5 l/100 km across 8 declared configurations
CO₂ per tonne-km55.94 g Declaredmedian; 49.16–60.8 g53.5 g Declaredmedian; 47.9–60.3 g

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

What the numbers actually say

There is 1.8 l/100 km between these two (4.5%). 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 2,160 litres a year (£3,024). The declared figures for one of them alone span 9.2 l/100 km across its configurations, so the specification ordered matters more than the choice between these two.

FH, 413 kW, 6x4 tractor unit full specificationFMX, 405 kW, 6x4 tractor unit full specification

Fuel over a year

120,000 km · assumed price
Volvo FH, 413 kW, 6x4 tractor unit49,560 litres
£69,384 at the assumed price
Volvo FMX, 405 kW, 6x4 tractor unit47,400 litres
£66,360 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.