Porsche Cayenne — MPG & Fuel Costs 2025
Porsche's large luxury SUV, combining sports car DNA with high towing capacity and spacious family transport.
The Porsche Cayenne is credited with saving the Porsche brand, proving that a large SUV could handle like a sports car while offering excellent passenger comfort and heavy towing capabilities.
While older models featured highly frugal V6 diesel engines, newer generations focus on V6 petrol turbos and advanced plug-in hybrids (E-Hybrid). The hybrids are exceptionally cheap to run for short trips.
Real-world fuel economy is around 30 MPG for older diesel models and 20 MPG for standard petrol V6s. E-Hybrids can achieve 50+ MPG if charged regularly.
TL;DR
20 MPG
Real-world petrol
30 MPG
Real-world diesel
85L
Tank capacity
£116.28
Full tank (petrol)
31.1p
Per mile (petrol)
Real-World Fuel Economy: The Porsche Cayenne achieves an estimated 20 MPG (petrol) and 30 MPG (diesel) in real-world UK driving conditions, accounting for a 12% WLTP real-world penalty.
Forecourt Fuel Cost: Refueling the 85-litre tank completely costs approximately £116.28 (petrol) or £120.78 (diesel) at average UK fuel price rates.
Fuel economy at a glance
20
Real-world MPG
Petrol
24.8
Official WLTP
Petrol
30
Real-world MPG
Diesel
36.2
Official WLTP
Diesel
Annual fuel costs by mileage
| Annual mileage | Petrol | Diesel |
|---|---|---|
| 5,000 miles/yr | £1555 | £1077 |
| 7,400 miles/yr(UK average) | £2301 | £1593 |
| 10,000 miles/yr | £3109 | £2153 |
| 15,000 miles/yr | £4664 | £3230 |
| 20,000 miles/yr | £6219 | £4307 |
| Full tank (85L) | £116.28 | £120.78 |
| Cost per mile | 31.1p | 21.5p |
Based on UK average fuel prices: petrol 136.8p/L · diesel 142.1p/L. Prices updated regularly.
How does the Cayenne compare?
Tips to get better MPG from your Cayenne
PHEV E-Hybrid models should be plugged in daily to make the most of local electric running.
Use the coasting function of the Tiptronic automatic gearbox to roll without engine braking.
Avoid carrying unnecessary bulk in the cabin or cargo area of this heavy SUV.
Is the cheaper petrol station worth it?
In a Porsche Cayenne achieving ~20 MPG real-world, if you fill 68 litres and the alternative station is 10p/litre cheaper:
£6.80
Gross saving on fuel
£0.93
Cost of 3-mile detour
£5.87
Net saving ✓
You could drive up to 22 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 Cayenne?
The Porsche Cayenne achieves approximately 20 MPG in real-world petrol driving — around 12% lower than the official WLTP figure of 24.8 MPG due to real driving conditions. Diesel variants achieve around 30 MPG real-world.
How much does it cost to fill a Porsche Cayenne?
The Porsche Cayenne has a fuel tank of 85 litres. At the UK average of 136.8p/litre for petrol, a full tank costs approximately £116.28. Diesel costs approximately £120.78 for a full tank.
What is the annual fuel cost for a Porsche Cayenne?
At the UK average annual mileage of 7,400 miles and current petrol price of 136.8p/litre, a Porsche Cayenne costs approximately £2301 per year in fuel. At 10,000 miles/year the cost rises to £3109. Actual costs vary with your driving style and mileage.
Is it worth driving to a cheaper petrol station in a Porsche Cayenne?
In a Porsche Cayenne doing ~20 MPG real-world, driving 3 miles round-trip to save 10p/litre on a 68-litre fill nets approximately £5.87 after the extra fuel cost. You could drive up to 22 miles before the saving is eaten up. Use the WorthThePump calculator for your exact situation.
How much does the Porsche Cayenne cost per mile in fuel?
The Porsche Cayenne costs approximately 31.1p per mile in petrol at current UK prices. Over a typical commute of 30 miles per day, that is approximately £9.33 per day in fuel.
What is the WLTP MPG figure for the Porsche Cayenne?
The official WLTP fuel economy figure for the Porsche Cayenne is 24.8 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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