Ford Expedition XLT (2014) vs Mercedes-Benz GL450 4MATIC (2014)

Four-wheel drive is a system where torque is distributed to all four wheels of the vehicle. It is beneficial in some circumstances such as providing increased traction in tricky weather conditions, but is most suited to off-road driving.

The turn radius indicates the smallest circular turn a car can make. With a smaller turn radius it is easier to perform a U-turn in one attempt instead of having to reverse back and forth in order to turn around.

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This allows all four wheels to move up and down independently, providing a smoother ride when, for example, going over bumps in the road.

Air suspension offers a smoother ride than the traditional steel spring suspension. It is also often adjustable, allowing you to raise or lower it based on the type of driving you are doing.

A petrol (gasoline) engine offers several advantages over diesel. For example the engines tend to be lighter and cheaper than their diesel counterparts. Petrol engines also tend to have higher horsepower, and the fuel is more readily available.

Rear-wheel drive benefits from increased traction when accelerating, as the weight of the vehicle shifts to the rear over the drive wheels. The weight of the car is also more evenly distributed, resulting in improved handling.

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A larger cargo area is more practical as it allows you to transport more things. With some vehicles you can put the rear seats down in order to gain more space for cargo.

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More headroom in the front of the car makes for a more comfortable driving experience, and is especially important for taller people.

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The wheelbase is the distance between the center of the front and rear wheels. A longer wheelbase provides the car with more stability and a smoother ride (although a shorter wheelbase can provide more responsive handling).

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More headroom in the rear of the car makes for a more comfortable passenger experience, and is especially important for taller people. It is also useful if you are transporting cargo in the rear of the vehicle.

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Fuel economy is a measurement of fuel efficiency, based on how far you can travel with a certain amount of petrol (gasoline). A lower fuel economy means the car will be cheaper to run.

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Torque is a measurement of an engine’s power, closely related to horsepower. More torque indicates a more powerful vehicle and is also a good indication of its acceleration.

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Horsepower is the most common unit for measuring the power of an engine.

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A larger fuel tank means that you have to stop to refill less often.

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A turbocharger compresses the air entering the cylinders, allowing more air (and therefore more fuel) to be added - resulting in a more powerful explosion. This leads to an increase in horsepower without increasing the size and weight of the engine.

Fuel economy is a measurement of fuel efficiency, based on how far you can travel with a certain amount of petrol (gasoline). A lower fuel economy means the car will be cheaper to run.

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Airbags are designed to cushion occupants in the event of an impact. The standard number is around six but some cars now incorporate additional ones, such as knee airbags, side airbags and side curtain airbags.

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The vehicle has a tracking system that utilizes GPS, allowing you to locate it in case it is stolen.

A smart key is a wireless key that offers several benefits over a traditional key. For example when you approach the car the doors will automatically unlock, and you can turn the engine on with the press of a button.

With more USB ports, you are able to connect more devices.

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ISOFIX (also known as LATCH) is a standard system of attachment points for child safety seats, allowing them to be fitted quickly and safely.