What are the differences between rear-wheel drive and four-wheel drive?

[McLogan]

Four-wheel drive and rear-wheel drive differ in the number of driven wheels and handling characteristics. Below is relevant information about four-wheel drive systems: Definition of four-wheel drive: Four-wheel drive means all four wheels of the vehicle can receive driving force. In this way, the engine's power is distributed to all four wheels, reducing the likelihood of wheel slippage on poor road conditions and significantly improving the vehicle's off-road capability. Four-wheel drive systems are mainly divided into two categories: part-time four-wheel drive and full-time four-wheel drive. Classification of four-wheel drive systems: There are three common types of four-wheel drive systems in vehicles: on-demand four-wheel drive, full-time four-wheel drive, and part-time four-wheel drive. Full-time four-wheel drive systems are often found in luxury SUVs and high-performance sedans. Vehicles equipped with full-time four-wheel drive have power distributed to all four wheels at all times. This system enhances the mechanical grip of the wheels. Part-time four-wheel drive systems are commonly seen in rugged off-road vehicles. Vehicles with part-time four-wheel drive systems typically have three modes: high-range four-wheel drive, low-range four-wheel drive, and high-range two-wheel drive.