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

Scania R 660 A6x2*4 vs Scania S 770 A6x2

Lower declared fuel

Scania R 660 A6x2*4

2021–2023 · 485 kW
30.4l/100 km
median; 29.7–33.3 across 13 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 weight27,000–31,000 kgDeclaredmedian 28,000 kg, across 25 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 haul30.4 l/100 km Declaredmedian; 29.7–33.3 l/100 km across 13 declared configurations33.6 l/100 km Declaredmedian; 31.5–34.9 l/100 km across 40 declared configurations
CO₂ per tonne-km41.22 g Declaredmedian; 40.33–45.17 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

The Scania R 660 A6x2*4 declared 3.2 l/100 km less (10.5%) on the long haul at 19.3 t, 2022 declarations. At 120,000 km a year and an assumed £1.40 a litre, that is about 3,840 litres a year, or £5,376. A gap this size is outside the 10% tolerance of declared figures.

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*436,480 litres
£51,072 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.