AllTruckData
Comparison · 6×2 tractor unit · long haul at 19.3 t

Volvo FH, 345 kW, 6x2 tractor unit (from 2020) vs Volvo FMX, 345 kW, 6x2 tractor unit

Lower declared fuel

Volvo FH, 345 kW, 6x2 tractor unit (from 2020)

2020–2026 · 345 kW
29.3l/100 km
median; 27–35.9 across 321 declared configurations

Volvo FMX, 345 kW, 6x2 tractor unit

2021–2022 · 345 kW
35.6l/100 km
median; 35.6–38.3 across 3 declared configurations
Volvo FH, 345 kW, 6x2 tractor unit (from 2020) and Volvo FMX, 345 kW, 6x2 tractor unit side by side
SpecificationVolvo FH, 345 kW, 6x2 tractor unit (from 2020)Volvo FMX, 345 kW, 6x2 tractor unit
Vehicle formTractor unit for semi-trailer (BC)RegisteredTractor unit for semi-trailer (BC)Registered
Axle configuration6×2Declared6×2Declared
Registered new2020–2026Registeredcentral 90% of records2021–2022Registeredcentral 90% of records
Engine power345 kWDeclared345 kWDeclared
Engine displacement12.8 litresDeclared12.8 litresDeclared
GearboxautomatedDeclaredautomatedDeclared
Emission classEURO 6, EURO VI D, EURO VI ERegisteredNot recorded
Gross vehicle weight23,100–33,000 kgRegisteredmedian 27,000 kg, across 115 type-approval versions and 81 records without one27,000–31,000 kgDeclaredmedian 31,000 kg, across 6 declared configurations
Kerb weight6,849–22,768 kgRegisteredmedian 8,893 kg, over 1,115 registrationsNot recorded
Wheelbase3,700–5,270 mmRegisteredmedian 4,100 mm, over 1,115 registrationsNot recorded
Overall length5,990–7,810 mmRegisteredmedian 6,510 mm, over 1,115 registrationsNot recorded
Overall height3,420–4,000 mmRegisteredmedian 3,850 mm, over 301 registrationsNot recorded
Declared fuel, long haul29.3 l/100 km Declaredmedian; 27–35.9 l/100 km across 321 declared configurations35.6 l/100 km Declaredmedian; 35.6–38.3 l/100 km across 3 declared configurations
CO₂ per tonne-km39.75 g Declaredmedian; 36.57–48.66 g48.27 g Declaredmedian; 48.27–51.96 g

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

What the numbers actually say

The Volvo FH, 345 kW, 6x2 tractor unit (from 2020) declared 6.3 l/100 km less (21.5%) 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 7,560 litres a year, or £10,584. A gap this size is outside the 10% tolerance of declared figures.

FH, 345 kW, 6x2 tractor unit (from 2020) full specificationFMX, 345 kW, 6x2 tractor unit full specificationThe fuel ranking

Fuel over a year

120,000 km · assumed price
Volvo FH, 345 kW, 6x2 tractor unit (from 2020)35,160 litres
£49,224 at the assumed price
Volvo FMX, 345 kW, 6x2 tractor unit42,720 litres
£59,808 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.