When considering vehicle economy, the metric that often comes to mind is Miles Per Gallon (MPG). This figure represents the distance a car can travel on a single gallon of fuel, roughly 4.5 liters. MPG can vary significantly, from as low as 11 miles to much higher figures, as we will explore.
Traditionally, diesel engines have been lauded for their superior fuel efficiency compared to their petrol counterparts. However, with the increasing popularity of petrol and hybrid vehicles in markets like the UK, it’s pertinent to examine the most economical options across both categories.
It’s crucial to remember that a vehicle’s actual fuel consumption is influenced by driving habits. A more aggressive driving style will invariably lead to lower MPG than a smoother, more controlled approach.
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For the purpose of this comparison, we will utilize official average fuel economy ratings determined by the Worldwide Harmonised Light-duty Vehicles Test Procedure (WLTP) to ensure a fair and consistent evaluation.
Here are ten of the most fuel-efficient cars available today, encompassing a range of petrol, diesel, and hybrid powertrains:
- 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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Top Fuel-Efficient Petrol & Hybrid Cars
1. BMW 330e – Up to 217.3 mpg
The BMW 330e demonstrates that Efficient Fuel Consumption Cars can also deliver exhilarating performance. This plug-in hybrid model combines a 2.0-liter petrol engine with an electric motor, resulting in both rapid acceleration and exceptional fuel economy.
Motoring experts highlight the 330e plug-in hybrid as a standout in the BMW 3 Series lineup, celebrated for its ability to operate solely on electric power for approximately 30 miles and achieve over 100 mpg in combined driving conditions (based on official figures).
Mirroring the renowned quality of the BMW 3 Series range, the 330e boasts a premium interior equipped with advanced technology. The used car market also presents attractive opportunities to acquire BMW models at competitive prices.
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2. Toyota Prius – Up to 67.0 mpg (Self-Charging Hybrid)
Toyota’s Prius is available in both self-charging hybrid and plug-in hybrid variants. While the plug-in version boasts an impressive official economy of 235.4 mpg (conditional on regular battery charging), the self-charging Prius remains a highly economical choice, especially in the used car market, offering close to 70 mpg according to manufacturer data.
The plug-in hybrid Prius extends electric-only driving range for shorter commutes, further enhancing its fuel efficiency. Toyota is known for well-equipped interiors and exceptional build quality, and the Prius is no exception.
The Toyota Prius’s reputation for reliability and low running costs makes it a popular choice for taxi services, a testament to its real-world efficiency and durability.
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3. Suzuki Swift – Up to 64.0 mpg
The Suzuki Swift supermini incorporates Suzuki’s ‘Boosterjet’ hybrid engine across its current range. This mild hybrid system uses an electric motor to support the petrol engine, reducing strain and improving overall fuel economy.
Although the mild hybrid setup does not allow for pure electric driving, it delivers enhanced fuel efficiency compared to traditional petrol engines, along with improved acceleration performance.
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4. Toyota Corolla Touring Sports – Up to 63.8 mpg
The Toyota Corolla has made a successful return, now offering hybrid technology. The Touring Sports estate version, along with the hatchback, provides a refined driving experience with well-tuned suspension and responsive handling.
Available with a choice of 1.8-liter or 2.0-liter petrol-hybrid engines, all Corolla variants are well-equipped and offer excellent fuel economy up to 63.8 mpg.
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5. Hyundai IONIQ – Up to 60.0 mpg
Similar to the Prius, the Hyundai IONIQ is offered as a self-charging hybrid, with the plug-in hybrid variant presenting even greater value in the used car market.
Powered by a 1.6-liter petrol engine paired with an electric motor, the Hyundai IONIQ plug-in hybrid achieves an electric driving range of up to 39 miles on a full charge.
The IONIQ stands out for its overall cost-effectiveness, encompassing not only fuel savings but also potentially lower insurance and maintenance expenses, making it a financially smart choice for efficient fuel consumption. It also offers a larger boot space than the Prius while maintaining a commendable official fuel economy rating.
Top Fuel-Efficient Diesel Cars
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1. Mercedes-Benz E300 de – Up to 217.3 mpg
The Mercedes-Benz E300 de is a plug-in hybrid diesel, achieving an astonishing official fuel economy figure. To realize this MPG, consistent battery charging is essential.
With a fully charged battery, Mercedes-Benz claims an electric-only range of up to 33 miles for the E300 de, suitable for urban commutes. This model combines diesel efficiency with electric power, resulting in exceptional fuel consumption.
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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, it officially achieves over 70 mpg.
The Peugeot 208’s interior is equally stylish, featuring a modern dashboard design with instruments positioned for viewing above the steering wheel.
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3. Vauxhall Corsa 1.5 Turbo D – Up to 70.6 mpg
The Vauxhall Corsa shares its attractive design and underpinnings with the Peugeot 208, as both brands are part of Stellantis.
The Vauxhall Corsa utilizes the same engine and mechanical components as the Peugeot 208, resulting in remarkably similar fuel economy figures.
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4. Skoda Octavia 2.0 TDI SE – Up to 68.9 mpg
The Skoda Octavia is a versatile family car renowned for its generous interior space, particularly the Estate model with its large boot. The 2.0 TDI SE variant adds exceptional fuel economy to its list of attributes.
Equipped with a 150hp 2.0-liter TDI engine, the Skoda Octavia offers ample torque, enabling relaxed motorway cruising in higher gears.
The Skoda Octavia is recognized for its excellent value proposition, combining impressive fuel economy and renowned reliability at an accessible price point.
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5. Volkswagen Golf 2.0 TDI – Up to 68.9 mpg
Sharing components with the Skoda Octavia, the Volkswagen Golf Mk8 2.0 TDI offers similar fuel efficiency.
This Golf variant features the same 150hp diesel engine and six-speed manual gearbox as the Octavia. While slightly less spacious than the Octavia, the Golf provides a more premium interior feel, with digital instruments and a large infotainment screen in many versions. The used market offers attractive deals on Volkswagen Golf models.
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Driving More Fuel-Efficiently: Simple Changes, Significant Savings
Choosing a fuel-efficient car is a great first step, but adopting fuel-conscious driving habits can further maximize your MPG and minimize your environmental impact. Modern vehicles, especially those with turbochargers and hybrid technology, are inherently more efficient than older models, but driver behavior still plays a crucial role.
Practical Steps to Reduce Fuel Consumption:
1) Minimize Air Conditioning Use
Reducing your reliance on air conditioning can noticeably improve fuel economy. The A/C system places a significant load on the engine, consuming extra fuel to power the compressor and cooling system. Whenever possible, opt for natural ventilation or use the recirculation mode judiciously.
2) Drive Smoothly and Anticipate Traffic
Adopting a ‘smooth operator’ driving style significantly impacts fuel efficiency. Consistent throttle input and gentle braking maintain momentum and reduce unnecessary acceleration and deceleration. On motorways, maintaining a steady speed and minimizing fluctuations in revs optimizes fuel consumption. Similarly, smooth acceleration from a standstill reduces engine strain and fuel wastage. Anticipating traffic flow and maintaining a safe following distance allows for smoother driving and less braking.
3) Combine Short Trips and Optimize Routes
Frequent short trips are less fuel-efficient because the engine operates below its optimal temperature until fully warmed up. During the warm-up phase, fuel consumption is higher. Whenever feasible, combine errands into a single trip to allow the engine to reach its efficient operating temperature and stay there longer. Planning efficient routes that minimize stop-and-go traffic and unnecessary mileage also contributes to fuel savings.
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