Audi A3 — MPG & Fuel Costs 2025
Audi's premium compact hatchback. Refined, well-built, and available with efficient TFSI petrol and TDI diesel engines.
The Audi A3 Sportback is a premium family hatchback that combines high-tech infotainment with refined driving manners. It shares its mechanical platform with the Golf and Octavia but features a more upscale interior design and premium badge appeal.
The engine options include efficient TFSI petrol engines with mild-hybrid technology (on automatics) and robust TDI diesel units. The 35 TFSI (1.5-litre) petrol features cylinder-on-demand technology to shut down half the engine under light loads.
A real-world return of 44 MPG for petrols and 58 MPG for diesels makes the A3 a highly sensible premium choice. It handles motorway cruising with ease, offering a hushed cabin and excellent stability.
TL;DR
44 MPG
Real-world petrol
58 MPG
Real-world diesel
50L
Tank capacity
£68.40
Full tank (petrol)
14.1p
Per mile (petrol)
Real-World Fuel Economy: The Audi A3 achieves an estimated 44 MPG (petrol) and 58 MPG (diesel) in real-world UK driving conditions, accounting for a 12% WLTP real-world penalty.
Forecourt Fuel Cost: Refueling the 50-litre tank completely costs approximately £68.40 (petrol) or £71.05 (diesel) at average UK fuel price rates.
Fuel economy at a glance
44
Real-world MPG
Petrol
52.3
Official WLTP
Petrol
58
Real-world MPG
Diesel
68.9
Official WLTP
Diesel
Annual fuel costs by mileage
| Annual mileage | Petrol | Diesel |
|---|---|---|
| 5,000 miles/yr | £707 | £557 |
| 7,400 miles/yr(UK average) | £1046 | £824 |
| 10,000 miles/yr | £1413 | £1114 |
| 15,000 miles/yr | £2120 | £1671 |
| 20,000 miles/yr | £2827 | £2228 |
| Full tank (50L) | £68.40 | £71.05 |
| Cost per mile | 14.1p | 11.1p |
Based on UK average fuel prices: petrol 136.8p/L · diesel 142.1p/L. Prices updated regularly.
How does the A3 compare?
Tips to get better MPG from your A3
The S Tronic automatic gearbox features a coasting mode in Eco mode; lift off early to glide towards junctions.
Avoid heavy acceleration in Sport mode, which holds gears unnecessarily high and wastes fuel.
Maintain the fuel injection system with high-quality fuel or additives to keep the TFSI injectors clean.
Is the cheaper petrol station worth it?
In a Audi A3 achieving ~44 MPG real-world, if you fill 40 litres and the alternative station is 10p/litre cheaper:
£4.00
Gross saving on fuel
£0.42
Cost of 3-mile detour
£3.58
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 A3?
The Audi A3 achieves approximately 44 MPG in real-world petrol driving — around 12% lower than the official WLTP figure of 52.3 MPG due to real driving conditions. Diesel variants achieve around 58 MPG real-world.
How much does it cost to fill a Audi A3?
The Audi A3 has a fuel tank of 50 litres. At the UK average of 136.8p/litre for petrol, a full tank costs approximately £68.40. Diesel costs approximately £71.05 for a full tank.
What is the annual fuel cost for a Audi A3?
At the UK average annual mileage of 7,400 miles and current petrol price of 136.8p/litre, a Audi A3 costs approximately £1046 per year in fuel. At 10,000 miles/year the cost rises to £1413. Actual costs vary with your driving style and mileage.
Is it worth driving to a cheaper petrol station in a Audi A3?
In a Audi A3 doing ~44 MPG real-world, driving 3 miles round-trip to save 10p/litre on a 40-litre fill nets approximately £3.58 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 A3 cost per mile in fuel?
The Audi A3 costs approximately 14.1p per mile in petrol at current UK prices. Over a typical commute of 30 miles per day, that is approximately £4.23 per day in fuel.
What is the WLTP MPG figure for the Audi A3?
The official WLTP fuel economy figure for the Audi A3 is 52.3 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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