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

Volvo FH, 405 kW, 6x4 tractor unit (2018–2023) vs Volvo FMX, 405 kW, 6x4 tractor unit

Lower declared fuel

Volvo FH, 405 kW, 6x4 tractor unit (2018–2023)

2018–2023 · 405 kW
35.2l/100 km
median; 31.1–43 across 159 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, 405 kW, 6x4 tractor unit (2018–2023) and Volvo FMX, 405 kW, 6x4 tractor unit side by side
SpecificationVolvo FH, 405 kW, 6x4 tractor unit (2018–2023)Volvo 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 new2018–2023Registeredcentral 90% of records2021–2023Registeredcentral 90% of records
Engine power405 kWDeclared405 kWDeclared
Engine displacement12.8 litresDeclared12.8 litresDeclared
GearboxautomatedDeclaredautomatedDeclared
Emission classEURO 5, EURO 6, EURO VI, EURO VI B, EURO VI C, EURO VI D, EURO VI ERegisteredNot recorded
Gross vehicle weight27,500–36,000 kgRegisteredmedian 32,000 kg, across 41 type-approval versions and 21 records without one28,500–36,000 kgDeclaredmedian 32,000 kg, across 19 declared configurations
Kerb weight9,049–19,450 kgRegisteredmedian 10,165 kg, over 96 registrationsNot recorded
Wheelbase4,370–5,270 mmRegisteredmedian 4,570 mm, over 96 registrationsNot recorded
Overall length6,700–7,800 mmRegisteredmedian 6,960 mm, over 96 registrationsNot recorded
Overall height3,150–4,000 mmRegisteredmedian 3,740 mm, over 37 registrationsNot recorded
Declared fuel, long haul35.2 l/100 km Declaredmedian; 31.1–43 l/100 km across 159 declared configurations39.5 l/100 km Declaredmedian; 35.3–44.5 l/100 km across 8 declared configurations
CO₂ per tonne-km47.77 g Declaredmedian; 42.12–58.3 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

The Volvo FH, 405 kW, 6x4 tractor unit (2018–2023) declared 4.3 l/100 km less (12.2%) on the long haul at 19.3 t, 2022 declarations. At 120,000 km a year and an assumed £1.40 a litre, that is about 5,160 litres a year, or £7,224. A gap this size is outside the 10% tolerance of declared figures.

FH, 405 kW, 6x4 tractor unit (2018–2023) full specificationFMX, 405 kW, 6x4 tractor unit full specificationThe fuel ranking

Fuel over a year

120,000 km · assumed price
Volvo FH, 405 kW, 6x4 tractor unit (2018–2023)42,240 litres
£59,136 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.