Audi A8 — MPG & Fuel Costs 2025
Audi's luxury flagship saloon, featuring an aluminum-intensive chassis, advanced driver aids, and powerful mild-hybrid engines.
TL;DR
26 MPG
Real-world petrol
36 MPG
Real-world diesel
82L
Tank capacity
£112.18
Full tank (petrol)
23.9p
Per mile (petrol)
Real-World Fuel Economy: The Audi A8 achieves an estimated 26 MPG (petrol) and 36 MPG (diesel) in real-world UK driving conditions, accounting for a 12% WLTP real-world penalty.
Forecourt Fuel Cost: Refueling the 82-litre tank completely costs approximately £112.18 (petrol) or £116.52 (diesel) at average UK fuel price rates.
Fuel economy at a glance
26
Real-world MPG
Petrol
31.4
Official WLTP
Petrol
36
Real-world MPG
Diesel
42.8
Official WLTP
Diesel
Annual fuel costs by mileage
| Annual mileage | Petrol | Diesel |
|---|---|---|
| 5,000 miles/yr | £1196 | £897 |
| 7,400 miles/yr(UK average) | £1770 | £1328 |
| 10,000 miles/yr | £2392 | £1794 |
| 15,000 miles/yr | £3588 | £2692 |
| 20,000 miles/yr | £4784 | £3589 |
| Full tank (82L) | £112.18 | £116.52 |
| Cost per mile | 23.9p | 17.9p |
Based on UK average fuel prices: petrol 136.8p/L · diesel 142.1p/L. Prices updated regularly.
How does the A8 compare?
Tips to get better MPG from your A8
Use cruise control on long motorway runs to keep the large body cruising efficiently.
The adaptive air suspension automatically lowers the car at speed, reducing drag.
Keep weight to a minimum; clean out heavy items from the large boot.
Is the cheaper petrol station worth it?
In a Audi A8 achieving ~26 MPG real-world, if you fill 66 litres and the alternative station is 10p/litre cheaper:
£6.60
Gross saving on fuel
£0.72
Cost of 3-mile detour
£5.88
Net saving ✓
You could drive up to 28 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 A8?
The Audi A8 achieves approximately 26 MPG in real-world petrol driving — around 12% lower than the official WLTP figure of 31.4 MPG due to real driving conditions. Diesel variants achieve around 36 MPG real-world.
How much does it cost to fill a Audi A8?
The Audi A8 has a fuel tank of 82 litres. At the UK average of 136.8p/litre for petrol, a full tank costs approximately £112.18. Diesel costs approximately £116.52 for a full tank.
What is the annual fuel cost for a Audi A8?
At the UK average annual mileage of 7,400 miles and current petrol price of 136.8p/litre, a Audi A8 costs approximately £1770 per year in fuel. At 10,000 miles/year the cost rises to £2392. Actual costs vary with your driving style and mileage.
Is it worth driving to a cheaper petrol station in a Audi A8?
In a Audi A8 doing ~26 MPG real-world, driving 3 miles round-trip to save 10p/litre on a 66-litre fill nets approximately £5.88 after the extra fuel cost. You could drive up to 28 miles before the saving is eaten up. Use the WorthThePump calculator for your exact situation.
How much does the Audi A8 cost per mile in fuel?
The Audi A8 costs approximately 23.9p per mile in petrol at current UK prices. Over a typical commute of 30 miles per day, that is approximately £7.17 per day in fuel.
What is the WLTP MPG figure for the Audi A8?
The official WLTP fuel economy figure for the Audi A8 is 31.4 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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