When you’re thinking about saving money at the pump, miles per gallon (MPG) is the number to keep in mind. MPG tells you exactly how far a car can travel on one gallon of gasoline. This can range quite dramatically, from gas-guzzlers managing only around 11 miles per gallon to incredibly efficient vehicles that go much, much further.
Historically, diesel engines have often been lauded for their superior fuel economy compared to their gasoline counterparts. However, with advancements in technology and shifting consumer preferences, particularly in markets like the UK where petrol and hybrid cars are favored, the landscape of fuel efficiency has become more diverse.
Before diving into specific models, it’s crucial to remember that a car’s actual MPG can vary based on individual driving habits. A driver with a more aggressive style will likely see lower MPG than someone who drives more conservatively.
For the sake of comparison, the fuel economy figures presented below are based on official average ratings determined by the Worldwide Harmonised Light-Duty Vehicles Test Procedure (WLTP), providing a standardized benchmark.
Here are some of the top fuel-efficient cars available on the market today, spanning both petrol and diesel options.
- BMW 330e
- Toyota Prius
- Suzuki Swift
- Toyota Corolla Touring Sports
- Hyundai IONIQ
- Mercedes-Benz E300 de
- Peugeot 208
- Vauxhall Corsa
- Skoda Octavia
- Volkswagen Golf
)
1. BMW 330e – Up to 217.3 MPG
The BMW 330e demonstrates that achieving excellent fuel economy doesn’t mean sacrificing driving pleasure. This plug-in hybrid pairs a responsive 2.0-liter petrol engine with a potent electric motor, resulting in both brisk acceleration and remarkable efficiency.
Our automotive expert, Sam, notes, “The 330e plug-in hybrid stands out in the BMW 3 Series lineup. It’s designed to travel approximately 30 miles on electric power alone and achieve over 100 MPG on paper, blending electric capability with traditional combustion.”
Like all BMW 3 Series models, the interior of the 330e boasts premium materials and cutting-edge technology. For those considering a used vehicle, the used BMW market offers attractive deals on these models.
)
2. Toyota Prius – Up to 67.0 MPG (Self-Charging Hybrid)
Toyota’s iconic Prius is available in both self-charging hybrid and plug-in hybrid variants. While the plug-in version boasts an even higher official MPG of 235.4 MPG (when regularly charged), the self-charging Prius remains a highly economical choice.
The self-charging Prius, which doesn’t require plugging in, is often more affordable on the used car market and still delivers impressive fuel economy, approaching 70 MPG according to Toyota. Plug-in Prius models extend electric-only driving range for shorter trips.
Inside, the Prius is well-equipped, a hallmark of Toyota vehicles, and built with renowned Toyota reliability.
Sam comments, “The Toyota Prius is a common sight as a taxi, and for good reason. It’s incredibly dependable and cost-effective to operate, making it a smart choice for high-mileage driving.”
)
3. Suzuki Swift – Up to 64.0 MPG
Every current Suzuki Swift model incorporates Suzuki’s ‘Boosterjet’ hybrid engine technology. This mild-hybrid system uses an electric motor to lessen the load on the petrol engine, enhancing overall efficiency.
Although the Swift’s mild-hybrid setup doesn’t allow for pure electric driving, it still provides superior fuel economy compared to standard petrol engines, along with a boost in acceleration.
)
4. Toyota Corolla Touring Sports – Up to 63.8 MPG
The Toyota Corolla has made a successful return, now offering stylish design and efficient hybrid powertrains.
The Touring Sports is the estate (wagon) version of the Corolla. Both the estate and hatchback models deliver an engaging driving experience with well-tuned suspension and responsive handling.
All Corolla versions come well-equipped, and buyers can choose between two petrol-hybrid engines (1.8-liter or 2.0-liter) both achieving up to 63.8 MPG.
)
5. Hyundai IONIQ – Up to 60.0 MPG
Similar to the Toyota Prius, the Hyundai IONIQ is available as a self-charging hybrid. However, the plug-in hybrid IONIQ often presents better value in the used car market.
This Hyundai utilizes a 1.6-liter petrol engine paired with an electric motor, providing an electric driving range of up to 39 miles on a full charge.
Sam highlights the IONIQ’s comprehensive cost-effectiveness, stating, “Beyond fuel savings, the IONIQ also typically benefits from lower insurance premiums and reduced maintenance costs, contributing to overall savings.”
The IONIQ includes a generous list of standard features and offers a larger cargo area than the Prius. While its official MPG is slightly less than the Prius, it remains a highly economical and practical choice.
Top Fuel-Efficient Diesel Cars Available:
)
1. Mercedes-Benz E300 de – Up to 217.3 MPG
This isn’t a typo – the Mercedes-Benz E300 de is indeed a plug-in hybrid diesel, delivering an astonishing official MPG figure for maximum mileage.
To achieve this remarkable economy, consistent battery charging is essential. Mercedes-Benz claims that a fully charged battery provides up to 33 miles of electric-only range for the E300 de, suitable for urban commutes.
)
2. Peugeot 208 1.5 Blue HDi – Up to 71.4 MPG
Introduced in 2019, the Peugeot 208 diesel is a visually appealing supermini.
Featuring five doors, distinctive LED lighting, and a 1.5-liter diesel engine, the Peugeot 208 officially achieves over 70 MPG.
The Peugeot 208’s interior is equally stylish, featuring a modern dashboard design with instruments viewed above, rather than through, the steering wheel.
)
3. Vauxhall Corsa 1.5 Turbo D – Up to 70.6 MPG
The visual similarities between the Corsa and Peugeot 208 are no accident, as both brands are part of Stellantis.
Beneath the surface, the Vauxhall Corsa shares many components with the Peugeot, including the engine and mechanicals, resulting in comparable fuel economy figures.
)
4. Skoda Octavia 2.0 TDI SE – Up to 68.9 MPG
The Skoda Octavia is a highly practical family car, offering ample interior space, especially the Estate (wagon) model with its large trunk. This version combines this practicality with exceptional fuel economy.
The Skoda Octavia’s 150hp 2.0-liter TDI engine prioritizes torque over outright power, enabling relaxed cruising and less frequent gear changes, particularly on highways.
Sam values the Octavia’s reputation for value, noting, “The Octavia delivers outstanding fuel economy and impressive reliability, all at a price point that is accessible to budget-conscious buyers.”
)
5. Volkswagen Golf 2.0 TDI – Up to 68.9 MPG
Similar to the Peugeot-Vauxhall relationship, Skoda and Volkswagen share engineering DNA.
This Mk8 Golf variant features the same 150hp diesel engine and six-speed manual transmission as the Octavia.
While the Golf offers slightly less interior space than the Octavia, it provides a more premium feel, with digital instruments and a large infotainment screen in many trims. The used VW market provides opportunities to find Golf models at attractive prices.
- Explore financing options for your fuel-efficient car Car Finance
Driving More Efficiently: Simple Steps to Save Fuel
Choosing a fuel-efficient car is a great first step, but adopting fuel-conscious driving habits can further maximize your MPG and reduce fuel costs. It’s beneficial for your wallet and contributes to a smaller environmental footprint.
Modern cars offer a range of engine technologies, with petrol engines supported by hybrid systems and advanced diesel engines often leading in fuel efficiency, especially for longer journeys. However, even conventional petrol engines have become more efficient through turbocharging and hybrid technologies.
Easy Changes to Improve Fuel Consumption:
1) Minimize Air Conditioning Use
Reducing your use of air conditioning can noticeably improve fuel economy. The AC system places a significant load on the engine, consuming extra fuel.
2) Drive Smoothly and Steadily
Gentle acceleration and maintaining a constant speed are key to fuel efficiency.
On the highway, maintaining consistent revs and speed optimizes fuel economy. Similarly, smooth starts and stops in city driving reduce strain on the engine and save fuel.
3) Combine Short Trips
Whenever possible, consolidate short trips. Cold starts are less fuel-efficient as the engine needs time to reach its optimal operating temperature. Combining errands into a single trip allows the engine to warm up fully and operate more efficiently, reducing fuel consumption overall.
)
