Audi A8 vs Mercedes-Benz S 450 e: real-world fuel use
In real life the Mercedes-Benz S 450 e uses 3.2 L/100 km less fuel than the Audi A8 — about £666 a year at 15,000 km and £1.40/L.
791 cars in the data
Audi A84.6×the official figure
Official
2.0
Real world
9.4
0510 L/100 km
214 cars in the data
Mercedes-Benz S 450 e9.5×the official figure
Official
0.7
Real world
6.2
0510 L/100 km
| Audi A8 | Mercedes-Benz S 450 e | |
|---|---|---|
| Real fuel use (L/100 km) | 9.4 | 6.2 |
| Official fuel use (L/100 km) | 2.0 | 0.7 |
| Gap vs official | 4.6× | 9.5× |
| Distance with engine off | 19% | 31% |
| Real CO2 from fuel (g/km) | 217 | 144 |
| Official electric range (km) | 57 | 111 |
| Average kerb weight (kg) | 2,405 | 2,402 |
| Cars in the data | 791 | 214 |
Bold = better. Source: EEA OBFCM real-world data, reporting year 2024, CC BY 4.0.
Which one is cheaper to run?
On fuel alone, the Mercedes-Benz S 450 e comes out ahead for the average owner. Your own result depends mostly on how often you charge. Owners drive the Audi A8 19% of the time with the engine off, and the Mercedes-Benz S 450 e 31%. Run the calculator with your own driving.