Vauxhall Senator — MPG & Fuel Costs 2025
Vauxhall's classic, high-performance executive saloon. Renowned for its smooth straight-six engines and high cruising refinement.
The Vauxhall Senator B was a premium executive saloon, highly popular as a police motorway patrol car in the late 1980s and early 1990s.
It features a range of smooth straight-six petrol engines, delivering strong performance and high refinement.
Real-world fuel economy is low by modern standards, with the V6 averaging around 20 MPG in mixed driving.
TL;DR
20 MPG
Real-world petrol
75L
Tank capacity
£102.60
Full tank (petrol)
31.1p
Per mile (petrol)
Real-World Fuel Economy: The Vauxhall Senator achieves an estimated 20 MPG in real-world UK driving conditions, accounting for a 12% WLTP real-world penalty.
Forecourt Fuel Cost: Refueling the 75-litre tank completely costs approximately £102.60 at average UK fuel price rates.
Fuel economy at a glance
20
Real-world MPG
Petrol
25.6
Official WLTP
Petrol
Annual fuel costs by mileage
| Annual mileage | Petrol |
|---|---|
| 5,000 miles/yr | £1555 |
| 7,400 miles/yr(UK average) | £2301 |
| 10,000 miles/yr | £3109 |
| 15,000 miles/yr | £4664 |
| 20,000 miles/yr | £6219 |
| Full tank (75L) | £102.60 |
| Cost per mile | 31.1p |
Based on UK average fuel prices: petrol 136.8p/L · diesel 142.1p/L. Prices updated regularly.
How does the Senator compare?
Tips to get better MPG from your Senator
The Senator's straight-six engines are thirsty; drive gently to manage fuel usage.
Keep speed consistent on motorway journeys using the standard cruise control if equipped.
Regular servicing is key to maintaining the efficiency of the Bosch fuel injection.
Is the cheaper petrol station worth it?
In a Vauxhall Senator achieving ~20 MPG real-world, if you fill 60 litres and the alternative station is 10p/litre cheaper:
£6.00
Gross saving on fuel
£0.93
Cost of 3-mile detour
£5.07
Net saving ✓
You could drive up to 19 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 Senator?
The Vauxhall Senator achieves approximately 20 MPG in real-world petrol driving — around 12% lower than the official WLTP figure of 25.6 MPG due to real driving conditions. Diesel variants achieve around N/A MPG real-world.
How much does it cost to fill a Vauxhall Senator?
The Vauxhall Senator has a fuel tank of 75 litres. At the UK average of 136.8p/litre for petrol, a full tank costs approximately £102.60. Diesel costs approximately £106.58 for a full tank.
What is the annual fuel cost for a Vauxhall Senator?
At the UK average annual mileage of 7,400 miles and current petrol price of 136.8p/litre, a Vauxhall Senator 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 Vauxhall Senator?
In a Vauxhall Senator doing ~20 MPG real-world, driving 3 miles round-trip to save 10p/litre on a 60-litre fill nets approximately £5.07 after the extra fuel cost. You could drive up to 19 miles before the saving is eaten up. Use the WorthThePump calculator for your exact situation.
How much does the Vauxhall Senator cost per mile in fuel?
The Vauxhall Senator 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 Vauxhall Senator?
The official WLTP fuel economy figure for the Vauxhall Senator is 25.6 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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