Comparison · 6×2 tractor unit · long haul at 19.3 t
Scania R 660 A6x2/4 vs Scania S 660 A6x2, tractor unit (2021–2023)
Scania R 660 A6x2/4
2021–2023 · 485 kW
30.8l/100 km
median; 28.8–34.8 across 24 declared configurations
Scania S 660 A6x2, tractor unit (2021–2023)
2021–2023 · 485 kW
31.4l/100 km
median; 28.8–32.6 across 97 declared configurations
What the numbers actually say
There is 0.6 l/100 km between these two (1.9%). 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 720 litres a year (£1,008). 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.
Fuel over a year
120,000 km · assumed priceScania R 660 A6x2/436,960 litres
£51,744 at the assumed price
Scania S 660 A6x2, tractor unit (2021–2023)37,680 litres
£52,752 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.