Comparison · 4×2 tractor unit · long haul at 19.3 t

MAN TGS 18.430 4x2, tractor unit (2019–2023) vs Volvo FM, 315 kW, 4x2 tractor unit (2020–2023)

MAN TGS 18.430 4x2, tractor unit (2019–2023)

2019–2023 · 316–346 kW (median 316)
31.5l/100 km
median; 28.1–34.7 across 178 declared configurations

Volvo FM, 315 kW, 4x2 tractor unit (2020–2023)

2020–2023 · 315 kW
29.9l/100 km
median; 27.6–34.6 across 54 declared configurations
MAN TGS 18.430 4x2, tractor unit (2019–2023) and Volvo FM, 315 kW, 4x2 tractor unit (2020–2023) side by side
SpecificationMAN TGS 18.430 4x2, tractor unit (2019–2023)Volvo FM, 315 kW, 4x2 tractor unit (2020–2023)
Vehicle formTractor unit for semi-trailer (BC)RegisteredTractor unit for semi-trailer (BC)Registered
Axle configuration4×2Declared4×2Declared
Registered new2019–2023Registeredcentral 90% of records2020–2023Registeredcentral 90% of records
Engine power316–346 kWDeclaredmedian 316 kW, across 772 declared configurations315 kWDeclared
Engine displacement12.4 litresDeclared12.8 litresDeclared
Gearboxautomated, manualDeclaredautomatedDeclared
Emission classEURO 6, EURO VI D, EURO VI ERegisteredEURO 6, EURO VI D, EURO VI ERegistered
Gross vehicle weight18,000–21,000 kgRegisteredmedian 20,500 kg, across 10 type-approval versions and 3 records without one19,000–22,000 kgRegisteredmedian 20,500 kg, across 34 type-approval versions and 1 record without one
Kerb weight6,600–7,664 kgRegisteredmedian 7,320 kg, over 35 registrations7,119–8,143 kgRegisteredmedian 7,532 kg, over 304 registrations
Wheelbase3,600–3,900 mmRegisteredmedian 3,600 mm, over 35 registrations3,600–4,000 mmRegisteredmedian 3,800 mm, over 304 registrations
Overall length5,880–6,280 mmRegisteredmedian 5,980 mm, over 35 registrations5,790–6,410 mmRegisteredmedian 5,990 mm, over 304 registrations
Overall height3,070–3,920 mmRegisteredmedian 3,840 mm, over 33 registrations3,110–3,910 mmRegisteredmedian 3,410 mm, over 48 registrations
Declared fuel, long haul31.5 l/100 km Declaredmedian; 28.1–34.7 l/100 km across 178 declared configurations29.9 l/100 km Declaredmedian; 27.6–34.6 l/100 km across 54 declared configurations
CO₂ per tonne-km42.66 g Declaredmedian; 38.11–47.07 g40.48 g Declaredmedian; 37.48–46.87 g

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

What the numbers actually say

There is 1.6 l/100 km between these two (5.3%). 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 1,920 litres a year (£2,688). The declared figures for one of them alone span 7 l/100 km across its configurations, so the specification ordered matters more than the choice between these two.

Fuel over a year

120,000 km · assumed price
MAN TGS 18.430 4x2, tractor unit (2019–2023)37,800 litres
£52,920 at the assumed price
Volvo FM, 315 kW, 4x2 tractor unit (2020–2023)35,880 litres
£50,232 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.