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

Scania R 660 A6x2/4 vs Scania S 770 A6x2

Scania R 660 A6x2/4

2021–2023 · 485 kW
30.8l/100 km
median; 28.8–34.8 across 24 declared configurations

Scania S 770 A6x2

2021–2023 · 566 kW
33.6l/100 km
median; 31.5–34.9 across 40 declared configurations
Scania R 660 A6x2/4 and Scania S 770 A6x2 side by side
SpecificationScania R 660 A6x2/4Scania S 770 A6x2
Vehicle formTractor unit for semi-trailer (BC)RegisteredTractor unit for semi-trailer (BC)Registered
Axle configuration6×2Declared6×2Declared
Registered new2021–2023Registeredcentral 90% of records2021–2023Registeredcentral 90% of records
Engine power485 kWDeclared566 kWDeclared
Engine displacement16.4 litresDeclared16.4 litresDeclared
GearboxautomatedDeclaredautomatedDeclared
Emission classNot recordedEURO VI DRegistered
Gross vehicle weight25,800–28,000 kgDeclaredmedian 27,000 kg, across 44 declared configurations28,000–29,000 kgRegisteredmedian 28,000 kg, over 2 registrations
Kerb weightNot recorded10,015–10,235 kgRegisteredmedian 10,015 kg, over 2 registrations
WheelbaseNot recorded2,950–4,460 mmRegisteredmedian 2,950 mm, over 2 registrations
Overall lengthNot recorded6,750 mmRegistered
Declared fuel, long haul30.8 l/100 km Declaredmedian; 28.8–34.8 l/100 km across 24 declared configurations33.6 l/100 km Declaredmedian; 31.5–34.9 l/100 km across 40 declared configurations
CO₂ per tonne-km41.71 g Declaredmedian; 39.09–47.1 g45.55 g Declaredmedian; 42.77–47.3 g

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

What the numbers actually say

There is 2.8 l/100 km between these two (9%). 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 3,360 litres a year (£4,704). The declared figures for one of them alone span 6 l/100 km across its configurations, so the specification ordered matters more than the choice between these two.

R 660 A6x2/4 full specificationS 770 A6x2 full specificationThe fuel ranking

Fuel over a year

120,000 km · assumed price
Scania R 660 A6x2/436,960 litres
£51,744 at the assumed price
Scania S 770 A6x240,320 litres
£56,448 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.