BMW 7 Series — MPG & Fuel Costs 2025
BMW's flagship luxury saloon. Immense comfort, quiet running, and surprisingly efficient in 730d diesel form.
TL;DR
27 MPG
Real-world petrol
45 MPG
Real-world diesel
78L
Tank capacity
£106.70
Full tank (petrol)
23.0p
Per mile (petrol)
Real-World Fuel Economy: The BMW 7 Series achieves an estimated 27 MPG (petrol) and 45 MPG (diesel) in real-world UK driving conditions, accounting for a 12% WLTP real-world penalty.
Forecourt Fuel Cost: Refueling the 78-litre tank completely costs approximately £106.70 (petrol) or £110.84 (diesel) at average UK fuel price rates.
Fuel economy at a glance
27
Real-world MPG
Petrol
32.8
Official WLTP
Petrol
45
Real-world MPG
Diesel
53.3
Official WLTP
Diesel
Annual fuel costs by mileage
| Annual mileage | Petrol | Diesel |
|---|---|---|
| 5,000 miles/yr | £1152 | £718 |
| 7,400 miles/yr(UK average) | £1704 | £1062 |
| 10,000 miles/yr | £2303 | £1436 |
| 15,000 miles/yr | £3455 | £2153 |
| 20,000 miles/yr | £4607 | £2871 |
| Full tank (78L) | £106.70 | £110.84 |
| Cost per mile | 23.0p | 14.4p |
Based on UK average fuel prices: petrol 136.8p/L · diesel 142.1p/L. Prices updated regularly.
How does the 7 Series compare?
Tips to get better MPG from your 7 Series
Use cruise control extensively on long highway runs.
Use Eco Pro mode to optimize throttle curves and transmission mapping.
Charge the PHEV battery nightly to maximize electric-only running.
Is the cheaper petrol station worth it?
In a BMW 7 Series achieving ~27 MPG real-world, if you fill 62 litres and the alternative station is 10p/litre cheaper:
£6.20
Gross saving on fuel
£0.69
Cost of 3-mile detour
£5.51
Net saving ✓
You could drive up to 27 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 BMW 7 Series?
The BMW 7 Series achieves approximately 27 MPG in real-world petrol driving — around 12% lower than the official WLTP figure of 32.8 MPG due to real driving conditions. Diesel variants achieve around 45 MPG real-world.
How much does it cost to fill a BMW 7 Series?
The BMW 7 Series has a fuel tank of 78 litres. At the UK average of 136.8p/litre for petrol, a full tank costs approximately £106.70. Diesel costs approximately £110.84 for a full tank.
What is the annual fuel cost for a BMW 7 Series?
At the UK average annual mileage of 7,400 miles and current petrol price of 136.8p/litre, a BMW 7 Series costs approximately £1704 per year in fuel. At 10,000 miles/year the cost rises to £2303. Actual costs vary with your driving style and mileage.
Is it worth driving to a cheaper petrol station in a BMW 7 Series?
In a BMW 7 Series doing ~27 MPG real-world, driving 3 miles round-trip to save 10p/litre on a 62-litre fill nets approximately £5.51 after the extra fuel cost. You could drive up to 27 miles before the saving is eaten up. Use the WorthThePump calculator for your exact situation.
How much does the BMW 7 Series cost per mile in fuel?
The BMW 7 Series costs approximately 23.0p per mile in petrol at current UK prices. Over a typical commute of 30 miles per day, that is approximately £6.90 per day in fuel.
What is the WLTP MPG figure for the BMW 7 Series?
The official WLTP fuel economy figure for the BMW 7 Series is 32.8 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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