Vauxhall Cascada — MPG & Fuel Costs 2025
A comfortable, premium four-seat convertible. Perfect for scenic summer driving with sensible running costs.
The Vauxhall Cascada is a full-sized four-seat convertible launched to offer premium open-top cruising at a mainstream price point. It features a high-quality fabric roof that can be operated at speeds up to 30 mph.
Due to the chassis reinforcement required for convertibles, the Cascada is relatively heavy, which impacts its fuel economy compared to equivalent hatchbacks. The 2.0 CDTi diesel is the best match for the car's weight.
Real-world economy for the diesel version averages 45-48 MPG on longer drives, while the 1.4 Turbo petrol settles around 35-38 MPG under standard driving conditions.
TL;DR
37 MPG
Real-world petrol
46 MPG
Real-world diesel
56L
Tank capacity
£76.61
Full tank (petrol)
16.8p
Per mile (petrol)
Real-World Fuel Economy: The Vauxhall Cascada achieves an estimated 37 MPG (petrol) and 46 MPG (diesel) in real-world UK driving conditions, accounting for a 12% WLTP real-world penalty.
Forecourt Fuel Cost: Refueling the 56-litre tank completely costs approximately £76.61 (petrol) or £79.58 (diesel) at average UK fuel price rates.
Fuel economy at a glance
37
Real-world MPG
Petrol
43.5
Official WLTP
Petrol
46
Real-world MPG
Diesel
54.3
Official WLTP
Diesel
Annual fuel costs by mileage
| Annual mileage | Petrol | Diesel |
|---|---|---|
| 5,000 miles/yr | £840 | £702 |
| 7,400 miles/yr(UK average) | £1244 | £1039 |
| 10,000 miles/yr | £1681 | £1404 |
| 15,000 miles/yr | £2521 | £2106 |
| 20,000 miles/yr | £3362 | £2809 |
| Full tank (56L) | £76.61 | £79.58 |
| Cost per mile | 16.8p | 14.0p |
Based on UK average fuel prices: petrol 136.8p/L · diesel 142.1p/L. Prices updated regularly.
How does the Cascada compare?
Tips to get better MPG from your Cascada
Drive with the roof up on motorways to improve aerodynamics and decrease drag.
Avoid using the air conditioning when the roof is down as it wastes energy unnecessarily.
Anticipate hills and change down early to keep the heavy body moving without engine strain.
Is the cheaper petrol station worth it?
In a Vauxhall Cascada achieving ~37 MPG real-world, if you fill 45 litres and the alternative station is 10p/litre cheaper:
£4.50
Gross saving on fuel
£0.50
Cost of 3-mile detour
£4.00
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 Vauxhall Cascada?
The Vauxhall Cascada achieves approximately 37 MPG in real-world petrol driving — around 12% lower than the official WLTP figure of 43.5 MPG due to real driving conditions. Diesel variants achieve around 46 MPG real-world.
How much does it cost to fill a Vauxhall Cascada?
The Vauxhall Cascada has a fuel tank of 56 litres. At the UK average of 136.8p/litre for petrol, a full tank costs approximately £76.61. Diesel costs approximately £79.58 for a full tank.
What is the annual fuel cost for a Vauxhall Cascada?
At the UK average annual mileage of 7,400 miles and current petrol price of 136.8p/litre, a Vauxhall Cascada costs approximately £1244 per year in fuel. At 10,000 miles/year the cost rises to £1681. Actual costs vary with your driving style and mileage.
Is it worth driving to a cheaper petrol station in a Vauxhall Cascada?
In a Vauxhall Cascada doing ~37 MPG real-world, driving 3 miles round-trip to save 10p/litre on a 45-litre fill nets approximately £4.00 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 Vauxhall Cascada cost per mile in fuel?
The Vauxhall Cascada costs approximately 16.8p per mile in petrol at current UK prices. Over a typical commute of 30 miles per day, that is approximately £5.04 per day in fuel.
What is the WLTP MPG figure for the Vauxhall Cascada?
The official WLTP fuel economy figure for the Vauxhall Cascada is 43.5 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
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