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  • SpecsS3 · 718

Audi S3 Sportback vs Porsche 718 Boxster: which is cheaper to run?

What each kilometre costs, depending on your driving profile and how you charge. Annual projection and cumulative savings over 10 years.

compact · 2026 vs 2017 · 15,000 km/an · Mixed · Petrol 95 2.17 €/L · Methodology
Annual mileage
15,000 km
5,000 km50,000 km
Driving mix

30 % City · 50 % Road · 20 % Motorway

Fuel price
Petrol 95 2.17 €/L · Diesel 2.38 €/Lprix-carburants.gouv.fr — moyenne nationale du 05/10/2026 ; EDF Tarif Bleu Base au 01/08/2026 ; DC autoroute : moyenne des réseaux sans abonnement

Result · yearly energy cost

AAudi S3 Sportback

2,748 €per year

8,4 L/100 km weighted · 18.32 € per 100 km · 1 266 L per year

Gap488 € per yearin favour of the S3 Sportback (−15 %)≈ 225 L petrol 95
BPorsche 718 Boxster

3,236 €per year

9,9 L/100 km weighted · 21.57 € per 100 km · 1 491 L per year

The verdict changes with your usage
ProfileSplitAA · S3BB · 718Gap
City70 / 25 / 570 % city · 25 % road · 5 % motorway2,813 €3,486 €673 € · S3
Mixed30 / 50 / 2030 % city · 50 % road · 20 % motorway2,748 €3,236 €488 € · S3
Long-distance10 / 40 / 5010 % city · 40 % road · 50 % motorway2,620 €3,008 €388 € · S3

Cumulative saving for the S3 Sportback

1 year
488 €
3 years
1,463 €
5 years
2,438 €
10 years
4,875 €

Energy only. Excludes purchase, insurance, servicing, depreciation.

What produces these figures

WLTP combined
8.7 L/100 km · 9.8 L/100 km
Powertrain
Combustion · Combustion
Power
333 ch · 300 ch
Kerb weight
1,535 kg · 1,335 kg

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Frequently asked questions

On a 100 km mixed trip, the Audi S3 Sportback is about 15% cheaper than the Porsche 718 Boxster with default parameters. This ratio shifts with your actual energy prices - simulate for your profile.

The Audi S3 Sportback is cheaper across all distances with default rates. If your energy prices differ significantly, simulate to see the real impact on your budget.