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Home›Consumption›Audi S8 vs BMW 840i

Consumption comparison

Audi S8 vs BMW 840i xDrive Convertible G15: how much do I save per year?

Same car, two powertrains. The simulator below calculates the gap based on your mileage and charging type.

AudiPetrol

S8

82 L · 2025

11,7 L/100km

VS
BMWPetrolMost economical

840i xDrive Convertible G15

68 L · 2021

8,0 L/100km

MotorwayRange & chargingPerformance0-100, top speedConsumptionAnnual TCO

Annual mileage

15 000 km/an

5 000 km50 000 km

Simulated driving mix

Drag anywhere on the bar to adjust

Fuel price

Petrol 95 : 2,03 €/L·Diesel : 2,25 €/L

Annual energy cost · 15 000 km

Typical annual usage : Mix 30% city / 50% road / 20% motorway

AudiPetrol

S8

Annual energy cost · 15 000 km

3 461€

23,07 € / 100 km

Equivalent to 1 702 L of petrol 95 per year

Weighted consumption
11,3 L/100km
Fuel price
2,03 €/L
Fuel used
1702,5 L per year
BMWPetrolMost economical

840i xDrive Convertible G15

Annual energy cost · 15 000 km

2 562€

17,08 € / 100 km

Equivalent to 1 260 L of petrol 95 per year

Weighted consumption
8,4 L/100km
Fuel price
2,03 €/L
Fuel used
1260,0 L per year
Annual gap 840i xDrive Convertible vs S8+900 €/an≈ 442 L petrol 95

BMW 840i xDrive Convertible G15 costs 900 €/an less in energy than Audi S8, over 15 000 km for this driving mix.

≈ 442 L of petrol 95 saved per year

Your savings over the ownership period

Cumulative projection by annual mileage. The cheaper-to-run vehicle widens the gap year after year.

Annual mileage

15 000 km/an

1 year

900 €

≈ 442 L petrol 95

3 years

2 699 €

≈ 1327 L petrol 95

5 years

4 498 €

≈ 2212 L petrol 95

10 years

8 995 €

≈ 4425 L petrol 95

Cumulative savings for BMW 840i xDrive Convertible G15 versus Audi S8. Excluding purchase, insurance, maintenance and depreciation.

Annual fuel cost breakdown

Projection over 15 000 km/year.

Audi

S8

Fuelkm/year€/kmAnnual cost
Annual fuel2,03 €/L15 000 km0,231 €/km3 461 €
BMW

840i xDrive Convertible G15

Fuelkm/year€/kmAnnual cost
Annual fuel2,03 €/L15 000 km0,171 €/km2 562 €

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Frequently asked questions

On a 100 km mixed trip, the BMW 840i xDrive Convertible is about 25% cheaper than the Audi S8 with default parameters. This ratio shifts with your actual energy prices - simulate for your profile.

The BMW 840i xDrive Convertible is cheaper across all distances with default rates. If your energy prices differ significantly, simulate to see the real impact on your budget.