Do you know what fuel efficiency means? It means how much gas a car uses to travel a certain distance. For example, if a car can travel 30 miles with one gallon of gas, it has a fuel efficiency of 30 miles per gallon (MPG). The higher the MPG, the better the fuel efficiency.

Fuel efficiency is important for many reasons. It helps us save money on gas, which can be very expensive. It also helps us protect the environment, because burning gas produces harmful gases that cause air pollution and global warming. That’s why many modern cars are designed to be more fuel-efficient, using less gas and producing less emissions.

But not all cars are fuel-efficient. Some cars use a lot of gas and produce a lot of emissions. These cars are called gas guzzlers, because they guzzle (or drink) a lot of gas. Gas guzzlers are usually big, powerful, and fast, but they are also bad for the environment and our wallets.

In this article, we will look at the top 10 most fuel-inefficient cars ever made, and why they don’t make 'em like this anymore. We will rank the cars based on their combined MPG, which is the average of their city and highway MPG. We will also consider their engine size, which is measured in liters (L) or cubic inches (ci), and their historical context, which is the time and place when they were made.

Are you ready to see some gas guzzlers gone wild? Let’s go!


Top 10 Most Fuel-Inefficient Cars

10. Lamborghini Aventador (2011-present)

  • Combined MPG: 11
  • Engine size: 6.5 L V12
  • Features and performance: The Lamborghini Aventador is a supercar that can go from 0 to 60 mph in 2.9 seconds and reach a top speed of 217 mph. It has a sleek and futuristic design, with scissor doors and a carbon-fiber body. It also has a rear spoiler that can adjust to different driving modes.


Why it’s fuel-inefficient: The Lamborghini Aventador is one of the most powerful and expensive cars in the world, costing over $400,000. It has a massive engine that produces 700 horsepower, which is more than 10 times the average car. It also has a low fuel economy rating, because it uses a lot of gas to achieve its high speed and performance.

  • Interesting fact: The Lamborghini Aventador was named after a famous fighting bull that was known for its courage and strength.


9. Hummer H1 (1992-2006)

  • Combined MPG: 10
  • Engine size: 6.5 L V8
  • Features and performance: The Hummer H1 was a military vehicle that was adapted for civilian use. It was a large and rugged SUV that could handle any terrain and weather. It had a high ground clearance, a four-wheel drive system, and a winch. It could also ford water up to 30 inches deep and climb steep slopes.


Why it’s fuel-inefficient: The Hummer H1 was designed for war, not for everyday driving. It was very heavy, weighing over 7,000 pounds, and very wide, measuring over 7 feet. It had a huge engine that consumed a lot of gas and produced a lot of noise and smoke. It also had a poor aerodynamics, which means it faced a lot of resistance from the air.

  • Interesting fact: The Hummer H1 was inspired by the High Mobility Multipurpose Wheeled Vehicle (HMMWV), also known as the Humvee, which was used by the U.S. military since 1985.


8. Ferrari 512 TR (1991-1996)

  • Combined MPG: 10
  • Engine size: 4.9 L V12
  • Features and performance: The Ferrari 512 TR was a sports car that was an improved version of the Ferrari Testarossa, which was famous for its appearance in the TV show Miami Vice. It had a sleek and elegant design, with a long and low body and a distinctive side air intake. It could go from 0 to 60 mph in 4.8 seconds and reach a top speed of 195 mph.


Why it’s fuel-inefficient: The Ferrari 512 TR was a luxury car that was made for speed and style, not for fuel economy. It had a powerful engine that generated 428 horsepower, which is more than six times the average car. It also had a high fuel consumption rate, because it used a lot of gas to maintain its high performance and smooth ride.

  • Interesting fact: The Ferrari 512 TR was named after its engine displacement (5.0 L) and its cylinder arrangement (12 cylinders in a flat or boxer configuration).


7. Bugatti Veyron (2005-2015)

  • Combined MPG: 10
  • Engine size: 8.0 L W16
  • Features and performance: The Bugatti Veyron was a hypercar that was one of the fastest and most expensive cars ever made, costing over $1.5 million. It had a unique and sophisticated design, with a horseshoe-shaped grille and a two-tone color scheme. It could go from 0 to 60 mph in 2.5 seconds and reach a top speed of 253 mph. It also had a spoiler that could act as an air brake.


Why it’s fuel-inefficient: The Bugatti Veyron was a masterpiece of engineering, but also a gas guzzler. It had a gigantic engine that produced 1,001 horsepower, which is more than 15 times the average car. It used a lot of gas to achieve its incredible speed and acceleration.

Interesting fact: The Bugatti Veyron was named after Pierre Veyron, a French racing driver who won the 24 Hours of Le Mans in 1939 with a Bugatti car.


6. Rolls-Royce Phantom (2003-present)

  • Combined MPG: 14
  • Engine size: 6.75 L V12
  • Features and performance: The Rolls-Royce Phantom is a luxury car that is one of the most prestigious and expensive cars in the world, costing over $400,000. It has a classic and elegant design, with a large and imposing grille and a Spirit of Ecstasy hood ornament. It has a spacious and comfortable interior, with leather seats, wood trim, and a starlight headliner. It also has a smooth and quiet ride, with a self-leveling suspension and a soundproof cabin.


Why it’s fuel-inefficient: The Rolls-Royce Phantom is a car that is made for comfort and quality, not for fuel economy. It has a huge engine that delivers 453 horsepower, which is more than seven times the average car. It also has a high fuel consumption rate, because it uses a lot of gas to power its heavy and luxurious body and features.

  • Interesting fact: The Rolls-Royce Phantom is the eighth generation of the Phantom model, which was first introduced in 1925.


5. Dodge Viper (1992-2017)

  • Combined MPG: 15
  • Engine size: 8.4 L V10
  • Features and performance: The Dodge Viper was a sports car that was one of the most powerful and iconic American cars ever made. It had a muscular and aggressive design, with a long and low body and a large hood scoop. It could go from 0 to 60 mph in 3.5 seconds and reach a top speed of 206 mph. It also had a raw and thrilling ride, with a manual transmission and a rear-wheel drive.


Why it’s fuel-inefficient: The Dodge Viper was a car that was made for fun and excitement, not for fuel economy. It had a massive engine that produced 645 horsepower, which is more than 10 times the average car. It also had a low fuel efficiency rating, because it used a lot of gas to deliver its high speed and performance.

  • Interesting fact: The Dodge Viper was inspired by the Shelby Cobra, a classic sports car that was designed by Carroll Shelby, a legendary American racing driver and car builder.


4. Ford F-150 SVT Raptor (2010-2014)

  • Combined MPG: 16
  • Engine size: 6.2 L V8
  • Features and performance: The Ford F-150 SVT Raptor was a pickup truck that was one of the most capable and versatile off-road vehicles ever made. It had a rugged and adventurous design, with a wide and high body and a large front grille. It had a powerful and durable engine that produced 411 horsepower, which is more than six times the average car. It also had a special suspension system that could absorb shocks and bumps on rough terrain.


Why it’s fuel-inefficient: The Ford F-150 SVT Raptor was a truck that was made for adventure and utility, not for fuel economy. It had a large engine that consumed a lot of gas and produced a lot of emissions. It also had a poor aerodynamics, which means it faced a lot of resistance from the air.

  • Interesting fact: The Ford F-150 SVT Raptor was named after the Velociraptor, a fast and agile dinosaur that was featured in the Jurassic Park movies.


3. Cadillac Eldorado (1979-1985)

  • Combined MPG: 17
  • Engine size: 6.0 L V8
  • Features and performance: The Cadillac Eldorado was a luxury car that was one of the most popular and stylish American cars of the 1980s. It had a sleek and elegant design, with a long and low body and a vinyl roof. It had a spacious and comfortable interior, with leather seats, a digital dashboard, and a stereo system. It also had a smooth and quiet ride, with a front-wheel drive and an automatic transmission.


Why it’s fuel-inefficient: The Cadillac Eldorado was a car that was made for comfort and quality, not for fuel economy. It had a large engine that delivered 145 horsepower, which is more than two times the average car. It also had a high fuel consumption rate, because it used a lot of gas to power its heavy and luxurious body and features.

  • Interesting fact: The Cadillac Eldorado was the first car to have a fully electronic fuel injection system, which improved its performance and emissions.


2. Chevrolet Corvette (1953-present)

  • Combined MPG: 18
  • Engine size: 6.2 L V8
  • Features and performance: The Chevrolet Corvette is a sports car that is one of the most iconic and beloved American cars ever made. It has a sporty and attractive design, with a short and high body and a convertible roof. It can go from 0 to 60 mph in 3.7 seconds and reach a top speed of 190 mph. It also has a fun and exciting ride, with a manual transmission and a rear-wheel drive.

Why it’s fuel-inefficient: The Chevrolet Corvette is a car that is made for fun and excitement, not for fuel economy. It has a powerful engine that produces 455 horsepower, which is more than seven times the average car. It also has a low fuel efficiency rating, because it uses a lot of gas to deliver its high speed and performance.

  • Interesting fact: The Chevrolet Corvette is the longest-running sports car in the world, with eight generations and over 60 years of history.


1. Bugatti Royale (1927-1933)

  • Combined MPG: 3
  • Engine size: 12.7 L I8
  • Features and performance: The Bugatti Royale was a luxury car that was one of the most extravagant and rare cars ever made, costing over $30 million in today’s money. It had a majestic and impressive design, with a long and high body and a hood ornament of an elephant. It had a spacious and lavish interior, with silk upholstery, crystal glassware, and a clock. It also had a smooth and powerful ride, with a front-wheel drive and a hydraulic brake.


Why it’s fuel-inefficient: The Bugatti Royale was a car that was made for royalty and nobility, not for fuel economy. It had a gigantic engine that produced 300 horsepower, which is more than four times the average car. It also had a very low fuel efficiency rating, because it used a lot of gas to power its massive and luxurious body and features.

  • Interesting fact: The Bugatti Royale was so exclusive that only six were ever made, and only three were sold to customers. The other three remained with the Bugatti family until they were sold to museums.


Other Notable Fuel-Inefficient Cars

The cars we have seen so far are not the only gas guzzlers in history. There are many other cars that were also fuel-inefficient, but didn’t make the top 10. Here are some honorable mentions:

  • Lincoln Continental (1961-1969): A luxury car that had a 7.6 L V8 engine and a 10 MPG rating. It was famous for its suicide doors and its role in the assassination of President John F. Kennedy.
  • Dodge Charger (1966-1978): A muscle car that had a 7.2 L V8 engine and a 13 MPG rating. It was popular for its performance and its appearance in the TV show The Dukes of Hazzard. 
  • Ferrari F40 (1987-1992): A supercar that had a 2.9 L V8 engine and a 11 MPG rating. It was the first car to break the 200 mph barrier and the last car to be personally approved by Enzo Ferrari.
  • Hummer H2 (2003-2009): A SUV that had a 6.0 L V8 engine and a 10 MPG rating. It was a smaller and more luxurious version of the Hummer H1, but still very large and heavy.
  • Bugatti Chiron (2016-present): A hypercar that has a 8.0 L W16 engine and a 11 MPG rating. It is the successor of the Bugatti Veyron and the current holder of the world speed record for a production car, at 304 mph.


Conclusion: The Future of Fuel Efficiency

We have seen some of the most fuel-inefficient cars ever made, and why they don’t make 'em like this anymore. These cars were impressive and fascinating, but they were also bad for the environment and our wallets.

Fortunately, the automotive industry has evolved and improved over the years, and fuel efficiency has become a more important factor in car design and production. There are many laws and regulations that require car manufacturers to meet certain standards of fuel economy and emissions. There are also many technologies and innovations that help cars use less gas and produce less emissions, such as hybrid engines, electric motors, and hydrogen fuel cells.

The future of fuel efficiency looks bright and promising, as more and more cars are becoming more eco-friendly and cost-effective. However, this does not mean that we have to give up on fun and excitement. There are still many cars that are both fuel-efficient and fun to drive, such as the Tesla Model S, the Toyota Prius, and the Honda Civic.

What do you think about fuel-inefficient cars? Do you have a favorite gas guzzler or a fuel-efficient car? Share your thoughts and experiences with us in the comments below!