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

Scania S 590 A6x4 vs Scania S 660 A6x4

Scania S 590 A6x4

2021–2024 · 434 kW
33.7l/100 km
median; 32–38.5 across 20 declared configurations

Scania S 660 A6x4

2022–2025 · 485 kW
33.9l/100 km
median; 31–41.9 across 53 declared configurations
Scania S 590 A6x4 and Scania S 660 A6x4 side by side
SpecificationScania S 590 A6x4Scania S 660 A6x4
Vehicle formTractor unit for semi-trailer (BC)RegisteredTractor unit for semi-trailer (BC)Registered
Axle configuration6×4Declared6×4Declared
Registered new2021–2024Registeredcentral 90% of records2022–2025Registeredcentral 90% of records
Engine power434 kWDeclared485 kWDeclared
Engine displacement16.4 litresDeclared16.4 litresDeclared
GearboxautomatedDeclaredautomatedDeclared
Emission classEURO VI ERegisteredEURO VI, EURO VI ERegistered
Gross vehicle weight30,000–36,000 kgRegisteredmedian 35,000 kg, across 3 type-approval versions and 3 records without one28,000–36,000 kgRegisteredmedian 30,000 kg, across 6 type-approval versions and 9 records without one
Kerb weight10,145–11,550 kgRegisteredmedian 10,526 kg, over 7 registrations10,155–10,865 kgRegisteredmedian 10,545 kg, over 23 registrations
Wheelbase4,500–4,950 mmRegisteredmedian 4,700 mm, over 7 registrations4,500–5,300 mmRegisteredmedian 4,700 mm, over 23 registrations
Overall length6,870–7,270 mmRegisteredmedian 6,910 mm, over 7 registrations6,800–7,560 mmRegisteredmedian 6,910 mm, over 23 registrations
Overall height3,790–4,000 mmRegisteredmedian 3,990 mm, over 6 registrations3,770–4,000 mmRegisteredmedian 3,990 mm, over 22 registrations
Declared fuel, long haul33.7 l/100 km Declaredmedian; 32–38.5 l/100 km across 20 declared configurations33.9 l/100 km Declaredmedian; 31–41.9 l/100 km across 53 declared configurations
CO₂ per tonne-km45.7 g Declaredmedian; 43.38–52.17 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 0.2 l/100 km between these two (0.5%). 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 240 litres a year (£336). 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.

S 590 A6x4 full specificationS 660 A6x4 full specificationThe fuel ranking

Fuel over a year

120,000 km · assumed price
Scania S 590 A6x440,440 litres
£56,616 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.