Audi A6 — MPG & Fuel Costs 2025
Audi's large rugged off-road estate. Ideal for country travel with high utility and strong V6 towing capacity.
TL;DR
40 MPG
Real-world diesel
73L
Tank capacity
£99.86
Full tank (petrol)
Real-World Fuel Economy: The Audi A6 achieves an estimated 40 MPG in real-world UK driving conditions, accounting for a 12% WLTP real-world penalty.
Forecourt Fuel Cost: Refueling the 73-litre tank completely costs approximately £103.73 at average UK fuel price rates.
Fuel economy at a glance
40
Real-world MPG
Diesel
47.9
Official WLTP
Diesel
Annual fuel costs by mileage
| Annual mileage | Diesel |
|---|---|
| 5,000 miles/yr | £807 |
| 7,400 miles/yr(UK average) | £1195 |
| 10,000 miles/yr | £1615 |
| 15,000 miles/yr | £2422 |
| 20,000 miles/yr | £3230 |
| Full tank (73L) | £103.73 |
| Cost per mile | 16.1p |
Based on UK average fuel prices: petrol 136.8p/L · diesel 142.1p/L. Prices updated regularly.
How does the A6 compare?
Tips to get better MPG from your A6
The Allroad has standard active suspension; lower it at speed for highway savings.
Avoid accelerating aggressively; V6 diesels consume much fuel when pushed.
Check wheel alignment to avoid tyre scrubbing and preserve MPG.
Is the cheaper petrol station worth it?
In a Audi A6 achieving ~40 MPG real-world, if you fill 58 litres and the alternative station is 10p/litre cheaper:
£5.80
Gross saving on fuel
£0.48
Cost of 3-mile detour
£5.32
Net saving ✓
You could drive up to 36 miles round-trip before the saving disappears entirely.
Calculate for your exact situationPopular variants
Frequently asked questions
What is the real-world MPG of the Audi A6?
The Audi A6 achieves approximately 40 MPG diesel in real-world conditions, around 12% lower than the official WLTP figure of 47.9 MPG.
How much does it cost to fill a Audi A6?
The Audi A6 has a fuel tank of 73 litres. At the UK average of 136.8p/litre for petrol, a full tank costs approximately £99.86. Diesel costs approximately £103.73 for a full tank.
What is the annual fuel cost for a Audi A6?
At 7,400 miles/year and 142.1p/litre diesel, a Audi A6 costs approximately £1195 per year in diesel.
Is it worth driving to a cheaper petrol station in a Audi A6?
In a Audi A6 doing ~40 MPG real-world, driving 3 miles round-trip to save 10p/litre on a 58-litre fill nets approximately £5.32 after the extra fuel cost. You could drive up to 36 miles before the saving is eaten up. Use the WorthThePump calculator for your exact situation.
How much does the Audi A6 cost per mile in fuel?
The Audi A6 costs approximately 16.1p per mile in diesel at current UK prices.
What is the WLTP MPG figure for the Audi A6?
The official WLTP fuel economy figure for the Audi A6 is 47.9 MPG. However, real-world MPG is typically 10–15% lower than WLTP due to cold starts, air conditioning, motorway speeds, and varying loads. WorthThePump uses a 12% real-world penalty to give a more accurate estimate.
Related guides
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