Most Economical Car

Economical car data by country & car type

Fuel Mileage Ratings
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Here you'll find the most efficient cars for each different class of vehicle.

We've listed the fuel consumption data by country since each has its own set of testing procedures.

Go ahead and select a country:

U.S. Most Economical Cars

U.K. Most Economical Cars

Ireland Most Economical Cars

Australia Most Economical Cars

Canada Most Economical Cars

India Most Economical Cars

Technology of Economical Engines

Before the 1990's economical cars typically used a small gasoline or petrol engine. Up until this point alternative engine technology was not yet advanced enough.

During the 1990's efficient diesel engines became increasingly popular due to the introduction of diesel turbo-chargers and direct injection. Diesel technology has continued to improve over the last two decades and today is a highly efficient, very refined power source.

Around the year 2000, hybrid cars consisting of both an internal combustion engine and an electric motor began to appear.

Pure electric vehicles are now starting to gain momentum due to a vast improvement in battery technology over the last decade.

Economical Gasoline Engines

When building the most economical car with a gasoline (petrol) engine its vital to keep the engine capacity down. Often only 3 in-line cylinders are used instead of the usual 4 cylinders. Cylinder deactivation can be used on larger 6 or 8 cylinder cars to shut down cylinders when they're not needed.

Direct fuel injection into the cylinders of gasoline engines allows for a more efficient fuel intake which results in lower fuel consumption.

Variable valve timing is another aid to fuel economy. The optimum valve timing setting depends on the engine speed, so having a system that can change the timings on the fly increases efficiency.

Economical Diesel Engines

Diesel engines are very popular in Europe and you'll find the most economical car tables for the U.K. are full of them. By contrast they are not widely used to power cars in the U.S. although this is changing.

We're seeing much smaller diesel engines now which are suitable for economical small cars. Turbochargers are fans which force extra air into the cylinders and they allow manufacturers to get the same performance from smaller engines.

Common rail diesel systems use an engine driven pump that produces extremely high injection pressures. The high pressure results in a more complete burn, more power and greater fuel efficiency.

Economical Hybrid Engines

The hybrid approach to building the most economical car is all about reducing the City MPG figure as much as possible. The city is where the hybrid technology works best. Out on the open road its largely negated.

Stop/start systems for a hybrid car's gasoline engine helps to save fuel by switching it off when stationary. Hybrids that offer all-electric modes boast even greater fuel savings since the gasoline (petrol) engine does not need to run at all until a certain speed is reached.

Regenerative braking converts the the hybrid car's kinetic energy into electric energy to be stored in batteries. Traditional brakes dissipate the energy as heat.

Electric Motors

Electric motors are about 90% efficient at converting the energy stored in batteries to mechanical energy to drive the wheels. By comparison an economical gasoline (petrol) internal combustion engine is roughly 25% efficient and a modern economical diesel engine is in the range of 40-45% efficient.

The reason electric motors are so much more efficient is because they only suffer energy loss in the form of heat. By contrast internal combustion engines have far greater heat energy losses and in addition also suffer energy loss in the form of engine friction, sound, and through running pumps and generators necessary for the engine to operate.

Most Economical Cars


Most Economical Cars U.S.
Most Economical Subcompacts
Most Economical Compacts
Most Economical Midsize Cars
Most Economical Large Cars
Most Economical SUV's
Most Economical Sports Cars
Most Economical Minivans
Most Economical Trucks
Most Economical Vans

U.K. & Ireland

Most Economical Cars U.K.
Most Economical Superminis
Most Economical Small Cars
Most Economical Family Cars
Most Economical 4x4's
Most Economical Sports Cars
Most Economical People Carriers
Most Economical Pickups
Most Economical Vans


Most Economical Cars Australia
Most Economical Convertibles
Most Economical Coupes
Most Economical Hatches
Most Economical Sedans
Most Economical Utes
Most Economical Vans
Most Economical Wagons


Most Economical Cars Canada
Most Efficient Two Seater Cars
Most Efficient Subcompacts
Most Efficient Compacts
Most Efficient Mid Size Cars
Most Efficient Full Size Cars
Most Efficient Station Wagons
Most Efficient SUV's
Most Efficient Pick Up Trucks
Most Efficient Large Vans


Most Efficient Cars India
Most Efficient Convertibles
Most Efficient Coupes
Most Efficient Electric Cars
Most Efficient Hatchbacks
Most Efficient Hybrids
Most Efficient Luxury Cars
Most Efficient Minivans
Most Efficient MUVs
Most Efficient Sedans
Most Efficient Sport Utilities

Car Reviews and Articles

Most Economical Hatchbacks: Honda Fit
Most Economical Diesel | 2011 Seat Ibiza Ecomotive
Small Economical Cars - Suzuki Alto / Nissan Pixo
Economical Car: Fiat 500 Lounge
Economical Car Reviews: Kia Soul
Economic Car | Hyundai Getz
Building Toyota's Most Efficient Car
Most Economical Car Information
Toyota Prius: Most Efficient Family Car
Economical Convertible: Mazda Miata
Top Economical Cars: Toyota Yaris 1.5
Economical SUV - Ford Escape Hybrid
Economical 4wd: VW Tiguan

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