Is RWD 2WD or 4WD?

RWD (Rear-wheel-drive) is a type of 2WD (two-wheel drive), specifically referring to a rear-wheel drive system. It falls under the category of two-wheel drive along with FWD (front-wheel drive), while 4WD (four-wheel drive) is an independent drive form that distributes power to all four wheels. It is commonly found in models focused on driving pleasure, such as the BMW 3 Series. In contrast, the four-wheel drive system significantly enhances stability under complex road conditions by distributing power to all four wheels, making it suitable for off-road use or rainy areas, but it has a more complex structure and higher fuel consumption. The choice of drive mode should be based on the usage scenario: rear-wheel drive is preferable for urban commuting or those pursuing handling performance, while four-wheel drive is more reliable for frequently handling harsh road conditions.