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

Scania R 660 A6x2/4 vs Scania S 770 A6x2/2

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 A6x2/2

2022–2023 · 566 kW
32.5l/100 km
median; 31.3–33.8 across 9 declared configurations
Scania R 660 A6x2/4 and Scania S 770 A6x2/2 side by side
SpecificationScania R 660 A6x2/4Scania S 770 A6x2/2
Vehicle formTractor unit for semi-trailer (BC)RegisteredTractor unit for semi-trailer (BC)Registered
Axle configuration6×2Declared6×2Declared
Registered new2021–2023Registeredcentral 90% of records2022–2023Registeredcentral 90% of records
Engine power485 kWDeclared566 kWDeclared
Engine displacement16.4 litresDeclared16.4 litresDeclared
GearboxautomatedDeclaredautomatedDeclared
Gross vehicle weight25,800–28,000 kgDeclaredmedian 27,000 kg, across 44 declared configurations24,000–28,000 kgDeclaredmedian 24,300 kg, across 40 declared configurations
Declared fuel, long haul30.8 l/100 km Declaredmedian; 28.8–34.8 l/100 km across 24 declared configurations32.5 l/100 km Declaredmedian; 31.3–33.8 l/100 km across 9 declared configurations
CO₂ per tonne-km41.71 g Declaredmedian; 39.09–47.1 g44.02 g Declaredmedian; 42.44–45.8 g

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

What the numbers actually say

There is 1.7 l/100 km between these two (5.5%). 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 2,040 litres a year (£2,856). 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 A6x2/2 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 A6x2/239,000 litres
£54,600 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.