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MustangPetrolvs420dDiesel
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  • SpecsMustang · 420d

Ford Mustang GT S550 450 vs BMW 420d F32: 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.

saloon · 2018 vs 2020 · 15,000 km/an · Mixed · Petrol 95 2.17 €/L · Diesel 2.38 €/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

AFord Mustang GT S550 450

4,371 €per year

13,4 L/100 km weighted · 29.14 € per 100 km · 2 015 L per year

Gap2,821 € per yearin favour of the 420d (−65 %)≈ 1,300 L petrol 95
BBMW 420d F32

1,550 €per year

4,4 L/100 km weighted · 10.34 € per 100 km · 653 L per year

The verdict changes with your usage
ProfileSplitAA · MustangBB · 420dGap
City70 / 25 / 570 % city · 25 % road · 5 % motorway5,027 €1,666 €3,361 € · 420d
Mixed30 / 50 / 2030 % city · 50 % road · 20 % motorway4,371 €1,550 €2,821 € · 420d
Long-distance10 / 40 / 5010 % city · 40 % road · 50 % motorway3,860 €1,468 €2,392 € · 420d

Cumulative saving for the 420d

1 year
2,821 €
3 years
8,463 €
5 years
14,106 €
10 years
28,211 €

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

What produces these figures

WLTP combined
12.7 L/100 km · 4.2 L/100 km
Powertrain
Combustion · Combustion
Power
455 ch · 190 ch
Kerb weight
1,738 kg · 1,605 kg

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VolvoVSBMW

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gap 515 €/year

Frequently asked questions

On a 100 km mixed trip, the BMW 420d is about 65% cheaper than the Ford Mustang GT S550 450 with default parameters. This ratio shifts with your actual energy prices - simulate for your profile.

The BMW 420d is cheaper across all distances with default rates. If your energy prices differ significantly, simulate to see the real impact on your budget.