Porsche 911 — MPG & Fuel Costs 2025
The definitive everyday sports car. Strong performance combined with surprisingly decent motorway cruise efficiency.
The Porsche 911 (specifically the 992 generation) is the benchmark sports car, offering supercar-slaying performance along with genuine daily usability and a rear-seat layout for extra practicality.
Powered by a 3.0-litre twin-turbocharged flat-six engine, it uses active aerodynamics and cylinder management to keep fuel consumption low when performance is not required.
Real-world fuel economy is highly respectable for a sports car, with motorway cruises easily returning 30-32 MPG, though aggressive driving will drop it to around 18-20 MPG.
TL;DR
24 MPG
Real-world petrol
64L
Tank capacity
£87.55
Full tank (petrol)
25.9p
Per mile (petrol)
Real-World Fuel Economy: The Porsche 911 achieves an estimated 24 MPG in real-world UK driving conditions, accounting for a 12% WLTP real-world penalty.
Forecourt Fuel Cost: Refueling the 64-litre tank completely costs approximately £87.55 at average UK fuel price rates.
Fuel economy at a glance
24
Real-world MPG
Petrol
28.5
Official WLTP
Petrol
Annual fuel costs by mileage
| Annual mileage | Petrol |
|---|---|
| 5,000 miles/yr | £1296 |
| 7,400 miles/yr(UK average) | £1918 |
| 10,000 miles/yr | £2591 |
| 15,000 miles/yr | £3887 |
| 20,000 miles/yr | £5182 |
| Full tank (64L) | £87.55 |
| Cost per mile | 25.9p |
Based on UK average fuel prices: petrol 136.8p/L · diesel 142.1p/L. Prices updated regularly.
How does the 911 compare?
Tips to get better MPG from your 911
Keep the PDK transmission in automatic mode to allow early upshifts and coasting when cruising.
The 911 has excellent aerodynamics; maintain steady speeds to utilize low drag efficiency.
Ensure tyre pressures are adjusted to the partial load settings for normal driving.
Is the cheaper petrol station worth it?
In a Porsche 911 achieving ~24 MPG real-world, if you fill 51 litres and the alternative station is 10p/litre cheaper:
£5.10
Gross saving on fuel
£0.78
Cost of 3-mile detour
£4.32
Net saving ✓
You could drive up to 20 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 Porsche 911?
The Porsche 911 achieves approximately 24 MPG in real-world petrol driving — around 12% lower than the official WLTP figure of 28.5 MPG due to real driving conditions. Diesel variants achieve around N/A MPG real-world.
How much does it cost to fill a Porsche 911?
The Porsche 911 has a fuel tank of 64 litres. At the UK average of 136.8p/litre for petrol, a full tank costs approximately £87.55. Diesel costs approximately £90.94 for a full tank.
What is the annual fuel cost for a Porsche 911?
At the UK average annual mileage of 7,400 miles and current petrol price of 136.8p/litre, a Porsche 911 costs approximately £1918 per year in fuel. At 10,000 miles/year the cost rises to £2591. Actual costs vary with your driving style and mileage.
Is it worth driving to a cheaper petrol station in a Porsche 911?
In a Porsche 911 doing ~24 MPG real-world, driving 3 miles round-trip to save 10p/litre on a 51-litre fill nets approximately £4.32 after the extra fuel cost. You could drive up to 20 miles before the saving is eaten up. Use the WorthThePump calculator for your exact situation.
How much does the Porsche 911 cost per mile in fuel?
The Porsche 911 costs approximately 25.9p per mile in petrol at current UK prices. Over a typical commute of 30 miles per day, that is approximately £7.77 per day in fuel.
What is the WLTP MPG figure for the Porsche 911?
The official WLTP fuel economy figure for the Porsche 911 is 28.5 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
Find the cheapest fuel for your 911
Enter your registration and we'll calculate whether the cheaper station nearby is worth the detour — factoring in your 911's real-world MPG.
Try WorthThePump — it's free