In the quest for fuel efficiency, understanding metrics like Miles Per Gallon (MPG) is crucial. MPG essentially tells you how many miles your car can travel on one gallon of fuel, approximately 4.5 litres. This can range significantly, from a mere 11 miles to much higher figures depending on the vehicle.
Historically, diesel cars have often been hailed as the champions of fuel economy, outperforming their petrol counterparts. However, with the evolving preferences of car buyers, particularly in the UK where petrol and hybrid cars are now favored, it’s essential to explore the most economical options across both categories. This guide will navigate you through the top contenders in the petrol and hybrid car market, highlighting their fuel efficiency and other key features.
It’s important to remember that a car’s actual fuel economy can vary based on driving habits. A more aggressive driving style will generally lead to lower MPG compared to a smoother, more controlled approach.
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For the purpose of this comparison, we will be using official average fuel economy ratings provided by the Worldwide Harmonised Light-Duty Vehicles Test Procedure (WLTP). This standard ensures a level playing field when comparing different models.
Here are ten of the most fuel-efficient cars currently available, blending petrol, hybrid, and diesel technologies:
- BMW 330e
- Toyota Prius
- Suzuki Swift
- Toyota Corolla Touring Sports
- Hyundai IONIQ
- Mercedes-Benz E300 de
- Peugeot 208
- Vauxhall Corsa
- Skoda Octavia
- Volkswagen Golf
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1. BMW 330e – Up to 217.3 mpg
The BMW 330e stands out as an economical hybrid car that doesn’t compromise on performance. It combines a 2.0-litre petrol engine with an electric motor, delivering both strong acceleration and exceptional fuel economy.
According to Sam Sheehan, our motoring expert, “The 330e plug-in hybrid variant of the BMW 3 Series is particularly noteworthy. It offers the flexibility to drive on pure electric power for approximately 30 miles and boasts impressive fuel efficiency figures exceeding 100 mpg in real-world conditions.”
In line with the BMW 3 Series reputation, the 330e features a premium interior packed with advanced technology. For those considering a used option, there are attractive deals available on used BMW models, making it an accessible entry into economical luxury.
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2. Toyota Prius – Around 67.0 mpg (Self-Charging Hybrid)
Toyota’s Prius is synonymous with hybrid technology, offering both self-charging and plug-in hybrid versions. While the plug-in variant boasts a staggering 235.4 mpg official economy (when regularly charged), the self-charging Prius remains a highly economical choice, especially in the used car market.
The self-charging Prius delivers close to 70 mpg and is more budget-friendly when purchased used from dealerships like Toyota. Plug-in Prius models enhance fuel savings further with their electric-only driving capabilities for shorter commutes.
Inside, the Prius is well-appointed, reflecting Toyota’s commitment to high equipment levels and build quality across their range.
Sam Sheehan notes, “The Toyota Prius’s popularity as a taxi is no coincidence. Its reliability and low running costs make it a smart choice for economical transportation.”
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3. Suzuki Swift – Up to 64.0 mpg
The Suzuki Swift supermini is a compelling option in the economical car segment. Every current Swift model incorporates Suzuki’s ‘Boosterjet’ hybrid engine, a mild hybrid system where an electric motor supports the petrol engine, reducing fuel consumption.
Although the mild hybrid system doesn’t allow for pure electric driving, it enhances fuel efficiency beyond standard petrol engines and provides extra power during acceleration. This makes the Suzuki Swift a practical and fuel-efficient car for everyday use.
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4. Toyota Corolla Touring Sports – Up to 63.8 mpg
The Toyota Corolla’s return to the UK market has been marked by significant improvements, particularly with its hybrid technology. The Corolla Touring Sports, the estate version, along with the hatchback, offers an engaging driving experience with well-tuned suspension and responsive handling.
Available with a choice of 1.8-litre or 2.0-litre petrol-hybrid engines, every Corolla variant is well-equipped and delivers excellent fuel economy up to 63.8 mpg. This makes it a versatile and economical car for families and individuals alike.
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5. Hyundai IONIQ – Around 60.0 mpg (Self-Charging Hybrid)
Similar to the Toyota Prius, the Hyundai IONIQ is available as both a self-charging hybrid and a plug-in hybrid. The plug-in hybrid IONIQ offers better value in the used car market, providing a cost-effective entry into economical car ownership.
Powered by a 1.6-litre petrol engine paired with an electric motor, this Hyundai offers an electric range of up to 39 miles on a single charge.
Sam Sheehan highlights the IONIQ’s overall cost-effectiveness: “Beyond fuel savings, the IONIQ also benefits from lower insurance premiums and reduced maintenance costs, making it an economically sound choice.”
The IONIQ comes with a generous array of standard features and a larger boot than the Prius. Its official fuel economy remains impressive, solidifying its position as a top economical car.
Top Fuel-Efficient Diesel Cars Available
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1. Mercedes-Benz E300 de – Up to 217.3 mpg
The Mercedes-Benz E300 de is an exceptional plug-in hybrid diesel that achieves remarkable fuel economy figures. It’s crucial to maintain the battery charge to reach its full potential, but the official figures are indeed impressive.
Mercedes claims an electric-only range of up to 33 miles on a full charge, suitable for urban commutes. This diesel hybrid technology makes the E300 de a leader in economical diesel cars.
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2. Peugeot 208 1.5 Blue HDi – Up to 71.4 mpg
Introduced in 2019, the Peugeot 208 diesel hybrid is a visually striking supermini. It features five doors, distinctive LED lighting, and a 1.5-litre diesel engine known for delivering over 70 mpg in real-world driving conditions.
The interior of this Peugeot is equally appealing, featuring a modern dashboard with instruments positioned above the steering wheel for an innovative driving experience. It’s a stylish and economical car in the supermini class.
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3. Vauxhall Corsa 1.5 Turbo D – Up to 70.6 mpg
The visual similarities between the Vauxhall Corsa and Peugeot 208 are not accidental; both brands are part of the Stellantis group. Sharing platforms and technology, the Vauxhall Corsa diesel variant uses the same efficient engine as the Peugeot, resulting in comparable fuel economy figures.
The Corsa combines style with practicality and economical performance, making it a solid choice for budget-conscious drivers.
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4. Skoda Octavia 2.0 TDI SE – Up to 68.9 mpg
The Skoda Octavia excels as a family car, offering generous interior space, particularly the Estate model with its large boot. The 2.0 TDI SE version adds exceptional fuel economy to its list of merits.
Powered by a 150hp 2.0-litre TDI engine, this Skoda balances performance with efficiency. Its high torque output allows for relaxed motorway cruising in top gear, minimizing gear changes and maximizing fuel savings.
Sam Sheehan praises the Octavia’s value proposition: “The Octavia delivers outstanding fuel economy and renowned reliability at a price point that is very accessible.”
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5. Volkswagen Golf 2.0 TDI – Up to 68.9 mpg
Mirroring the Peugeot-Vauxhall relationship, Skoda and VW share significant engineering components. The Mk8 Golf 2.0 TDI variant utilizes the same 150hp diesel engine and six-speed manual gearbox as the Octavia, resulting in similar fuel economy.
While the Golf may not offer the same interior space as the Octavia, it provides a more premium feel, especially with digital instruments and a large infotainment screen in many versions. Used VW Golf models offer excellent value, combining German engineering with economical running costs.
- Explore flexible car finance options to spread the cost.
Maximising Your Car’s Fuel Efficiency
Choosing a fuel-efficient car is a great first step towards saving money on fuel and reducing your environmental impact. Modern petrol engines with hybrid assistance and advanced diesel engines are among the most fuel-efficient, particularly for longer journeys. However, even standard modern petrol engines are designed for efficiency, incorporating turbochargers and hybrid technologies.
Simple Driving Habits to Improve Fuel Economy
Beyond choosing the right car, adopting fuel-efficient driving habits can significantly reduce your fuel consumption.
1) Reduce Air Conditioning Use
Turning off your air conditioning can lead to noticeable fuel savings. The engine works harder to power the A/C system, increasing fuel usage. Using it judiciously, especially at lower speeds or when outside air is cooler, can help.
2) Drive Smoothly
Smooth driving is key to fuel efficiency. Consistent acceleration and braking, especially on the motorway, helps maintain optimal fuel economy. Avoid harsh acceleration and heavy braking; instead, anticipate traffic flow and maintain a steady speed and rev count.
3) Combine Short Trips
Engines operate most efficiently once they reach their optimal temperature. Short trips, especially when the engine doesn’t fully warm up, consume more fuel. Combining errands into a single trip allows the engine to operate more efficiently for a longer duration, improving overall fuel economy.
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Discover More About Hybrid Car Technology
Hybrid cars represent a significant advancement in economical driving. Explore our resources to learn more about how hybrid technology can save you money and contribute to a greener environment.
