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

Volvo FM, 345 kW, 6x2 tractor unit, 12.8 L (2016–2023) vs Volvo FMX, 345 kW, 6x2 tractor unit

Lower declared fuel

Volvo FM, 345 kW, 6x2 tractor unit, 12.8 L (2016–2023)

2016–2023 · 345 kW
31.5l/100 km
median; 29–38.8 across 12 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 FM, 345 kW, 6x2 tractor unit, 12.8 L (2016–2023) and Volvo FMX, 345 kW, 6x2 tractor unit side by side
SpecificationVolvo FM, 345 kW, 6x2 tractor unit, 12.8 L (2016–2023)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 new2016–2023Registeredcentral 90% of records2021–2022Registeredcentral 90% of records
Engine power345 kWDeclared345 kWDeclared
Engine displacement12.8 litresDeclared12.8 litresDeclared
GearboxautomatedDeclaredautomatedDeclared
Emission classEEV, EURO 6, EURO V, EURO VI B, EURO VI C, EURO VI D, EURO VI ERegisteredNot recorded
Gross vehicle weight23,500–31,000 kgRegisteredmedian 27,000 kg, across 25 type-approval versions and 11 records without one27,000–31,000 kgDeclaredmedian 31,000 kg, across 6 declared configurations
Kerb weight7,725–20,320 kgRegisteredmedian 8,766 kg, over 56 registrationsNot recorded
Wheelbase3,800–5,070 mmRegisteredmedian 4,100 mm, over 56 registrationsNot recorded
Overall length6,200–7,300 mmRegisteredmedian 6,510 mm, over 56 registrationsNot recorded
Overall height3,000–3,950 mmRegisteredmedian 3,400 mm, over 19 registrationsNot recorded
Declared fuel, long haul31.5 l/100 km Declaredmedian; 29–38.8 l/100 km across 12 declared configurations35.6 l/100 km Declaredmedian; 35.6–38.3 l/100 km across 3 declared configurations
CO₂ per tonne-km42.72 g Declaredmedian; 39.36–52.7 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 FM, 345 kW, 6x2 tractor unit, 12.8 L (2016–2023) declared 4.1 l/100 km less (13%) 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 4,920 litres a year, or £6,888. A gap this size is outside the 10% tolerance of declared figures.

FM, 345 kW, 6x2 tractor unit, 12.8 L (2016–2023) full specificationFMX, 345 kW, 6x2 tractor unit full specificationThe fuel ranking

Fuel over a year

120,000 km · assumed price
Volvo FM, 345 kW, 6x2 tractor unit, 12.8 L (2016–2023)37,800 litres
£52,920 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.