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

Scania R 590 A6x4 vs Scania S 660 A6x4

Scania R 590 A6x4

2021–2025 · 434 kW
33.5l/100 km
median; 32.1–41 across 36 declared configurations

Scania S 660 A6x4

2022–2025 · 485 kW
33.9l/100 km
median; 31–41.9 across 53 declared configurations
Scania R 590 A6x4 and Scania S 660 A6x4 side by side
SpecificationScania R 590 A6x4Scania S 660 A6x4
Vehicle formTractor unit for semi-trailer (BC)RegisteredTractor unit for semi-trailer (BC)Registered
Axle configuration6×4Declared6×4Declared
Registered new2021–2025Registeredcentral 90% of records2022–2025Registeredcentral 90% of records
Engine power434 kWDeclared485 kWDeclared
Engine displacement16.4 litresDeclared16.4 litresDeclared
GearboxautomatedDeclaredautomatedDeclared
Emission classEURO VI, EURO VI ERegisteredEURO VI, EURO VI ERegistered
Gross vehicle weight28,000–36,000 kgRegisteredmedian 35,000 kg, across 7 type-approval versions and 2 records without one28,000–36,000 kgRegisteredmedian 30,000 kg, across 6 type-approval versions and 9 records without one
Kerb weight10,026–10,790 kgRegisteredmedian 10,135 kg, over 10 registrations10,155–10,865 kgRegisteredmedian 10,545 kg, over 23 registrations
Wheelbase4,500–4,700 mmRegisteredmedian 4,500 mm, over 10 registrations4,500–5,300 mmRegisteredmedian 4,700 mm, over 23 registrations
Overall length6,820–7,220 mmRegisteredmedian 6,870 mm, over 10 registrations6,800–7,560 mmRegisteredmedian 6,910 mm, over 23 registrations
Overall height3,220–4,000 mmRegisteredmedian 3,630 mm, over 8 registrations3,770–4,000 mmRegisteredmedian 3,990 mm, over 22 registrations
Declared fuel, long haul33.5 l/100 km Declaredmedian; 32.1–41 l/100 km across 36 declared configurations33.9 l/100 km Declaredmedian; 31–41.9 l/100 km across 53 declared configurations
CO₂ per tonne-km45.46 g Declaredmedian; 43.57–55.54 g45.9 g Declaredmedian; 42.08–56.82 g

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

What the numbers actually say

There is 0.4 l/100 km between these two (1.1%). 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 480 litres a year (£672). The declared figures for one of them alone span 10.9 l/100 km across its configurations, so the specification ordered matters more than the choice between these two.

R 590 A6x4 full specificationS 660 A6x4 full specificationThe fuel ranking

Fuel over a year

120,000 km · assumed price
Scania R 590 A6x440,200 litres
£56,280 at the assumed price
Scania S 660 A6x440,680 litres
£56,952 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.