BMW M6 Convertible (2015) review: 46 facts and highlights

A dual-clutch transmission (DCT) is an automated manual transmission that allows the driver to control gear-shifts themselves or to let the computer decide. Upshifts are extremely fast, resulting in smooth acceleration, and due to the uninterrupted power flow it also has the benefit of increasing fuel efficiency.

The CO2 emissions of the car, measured in grams per kilometre. A car with less emissions is better for the environment.

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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.

The basic warranty of a car covers all aspects other than parts which are subject to normal wear and tear, such as windscreen wipers and brake pads. It lasts either a certain number of years or amount of kilometres driven.

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The basic warranty of a car covers all aspects other than parts which are subject to normal wear and tear, such as windscreen wipers and brake pads. It lasts either a certain number of years or amount of kilometres driven.

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The drivetrain warranty covers parts of the car such as the engine, transmission, driveshaft etc. This is usually longer than the basic warranty. It lasts either a certain number of years or amount of kilometres driven.

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

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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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The time it takes for the car to accelerate from 0-100 kilometres per hour.

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The fastest speed that the car can reach.

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The coefficient of drag is one measurement of how well air travels around a vehicle. A lower value means it is more aerodynamic and the engine doesn't have to work as hard. It can result in faster speeds and lower fuel consumption.

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Although there are many aspects that determine the power, a higher number of cylinders is generally a good indication of the potential power of the engine.

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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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A Stop-Start system automatically turns off the engine when stopping in traffic or at a red light, and seamlessly starts it again when pressure is applied to the accelerator. This saves fuel and is more ecological.

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.

Torque is a measurement of an engine’s power, closely related to horsepower. More torque indicates a more powerful car, 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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Bluetooth is a wireless technology that allows you to easily transfer data between different devices, such as smartphones, tablets and computers.

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

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Height-adjustable seat belts permit passengers of different sizes to move the seat belt up or down for improved comfort. They are also especially useful for increasing the safety of children.

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

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

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A rear-view camera (also known as a back-up camera) provides a view of behind the vehicle, helping to prevent accidents. It is particularly useful in vehicles with large blind spots such as pickup trucks.