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

Volvo FM, 345 kW, 6x4 tractor unit, 10.8 L (2020–2022) vs Volvo FM, 345 kW, 6x4 tractor unit, 12.8 L (2020–2023)

Volvo FM, 345 kW, 6x4 tractor unit, 10.8 L (2020–2022)

2020–2022 · 345 kW
38.6l/100 km
median; across 1 declared configurations

Volvo FM, 345 kW, 6x4 tractor unit, 12.8 L (2020–2023)

2020–2023 · 345 kW
36.5l/100 km
median; 36.1–37.5 across 4 declared configurations
Volvo FM, 345 kW, 6x4 tractor unit, 10.8 L (2020–2022) and Volvo FM, 345 kW, 6x4 tractor unit, 12.8 L (2020–2023) side by side
SpecificationVolvo FM, 345 kW, 6x4 tractor unit, 10.8 L (2020–2022)Volvo FM, 345 kW, 6x4 tractor unit, 12.8 L (2020–2023)
Vehicle formTractor unit for semi-trailer (BC)RegisteredTractor unit for semi-trailer (BC)Registered
Axle configuration6×4Declared6×4Declared
Registered new2020–2022Registeredcentral 90% of records2020–2023Registeredcentral 90% of records
Engine power345 kWDeclared345 kWDeclared
Engine displacement10.8 litresDeclared12.8 litresDeclared
GearboxautomatedDeclaredautomatedDeclared
Emission classNot recordedEURO VI B, EURO VI DRegistered
Gross vehicle weight28,500–31,000 kgDeclaredmedian 31,000 kg, across 3 declared configurations29,000–32,000 kgRegisteredmedian 29,000 kg, across 1 type-approval version and 1 record without one
Kerb weightNot recorded9,361–20,130 kgRegisteredmedian 9,361 kg, over 2 registrations
WheelbaseNot recorded4,770 mmRegistered
Overall lengthNot recorded6,940–7,400 mmRegisteredmedian 6,940 mm, over 2 registrations
Declared fuel, long haul38.6 l/100 km Declaredmedian; across 1 declared configuration36.5 l/100 km Declaredmedian; 36.1–37.5 l/100 km across 4 declared configurations
CO₂ per tonne-km52.31 g Declaredmedian49.4 g Declaredmedian; 48.97–50.81 g

Fuel and CO₂: long haul at 19.3 t, 2021 declarations.

What the numbers actually say

There is 2.1 l/100 km between these two (5.7%). 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 2,520 litres a year (£3,528).

FM, 345 kW, 6x4 tractor unit, 10.8 L (2020–2022) full specificationFM, 345 kW, 6x4 tractor unit, 12.8 L (2020–2023) full specification

Fuel over a year

120,000 km · assumed price
Volvo FM, 345 kW, 6x4 tractor unit, 10.8 L (2020–2022)46,320 litres
£64,848 at the assumed price
Volvo FM, 345 kW, 6x4 tractor unit, 12.8 L (2020–2023)43,800 litres
£61,320 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.