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

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

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 FM, 405 kW, 6x4 tractor unit

2018–2023 · 405 kW
35.3l/100 km
median; across 2 declared configurations
Volvo FH, 405 kW, 6x4 tractor unit (2018–2023) and Volvo FM, 405 kW, 6x4 tractor unit side by side
SpecificationVolvo FH, 405 kW, 6x4 tractor unit (2018–2023)Volvo FM, 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 records2018–2023Registeredcentral 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 ERegisteredEURO 6, EURO VI B, EURO VI C, EURO VI ERegistered
Gross vehicle weight27,500–36,000 kgRegisteredmedian 32,000 kg, across 41 type-approval versions and 21 records without one29,000–35,000 kgRegisteredmedian 32,000 kg, across 7 type-approval versions and 1 record without one
Kerb weight9,049–19,450 kgRegisteredmedian 10,165 kg, over 96 registrations7,570–10,160 kgRegisteredmedian 9,709 kg, over 9 registrations
Wheelbase4,370–5,270 mmRegisteredmedian 4,570 mm, over 96 registrations4,370–4,770 mmRegisteredmedian 4,570 mm, over 9 registrations
Overall length6,700–7,800 mmRegisteredmedian 6,960 mm, over 96 registrations6,740–7,120 mmRegisteredmedian 6,920 mm, over 9 registrations
Overall height3,150–4,000 mmRegisteredmedian 3,740 mm, over 37 registrations2,830–3,790 mmRegisteredmedian 3,540 mm, over 5 registrations
Declared fuel, long haul35.2 l/100 km Declaredmedian; 31.1–43 l/100 km across 159 declared configurations35.3 l/100 km Declaredmedian; across 2 declared configurations
CO₂ per tonne-km47.77 g Declaredmedian; 42.12–58.3 g47.84 g Declaredmedian; 47.84–47.87 g

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

What the numbers actually say

There is 0.1 l/100 km between these two (0.2%). 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 120 litres a year (£168). The declared figures for one of them alone span 11.9 l/100 km across its configurations, so the specification ordered matters more than the choice between these two.

FH, 405 kW, 6x4 tractor unit (2018–2023) full specificationFM, 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 FM, 405 kW, 6x4 tractor unit42,360 litres
£59,304 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.