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

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Front-engine four-wheel drive vehicles have the engine positioned in front of the front axle, with all four wheels driving the vehicle; whereas rear-engine four-wheel drive vehicles have the engine at the rear, also with four-wheel drive. Below is additional information: Introduction to Front-engine Four-wheel Drive: Front-engine four-wheel drive refers to a vehicle configuration where the engine is located at the front of the vehicle and power is delivered to all four wheels. The advantage of this setup is enhanced driving stability, particularly in off-road conditions such as hills, beaches, mud, and deserts. Introduction to Rear-engine Four-wheel Drive: Due to the excessive weight at the rear, during high-speed cornering, the majority of the vehicle's traction demand is placed on the rear wheels, which bear a significant burden. If the rear wheels lose grip due to excessive speed or poor road conditions, they can become uncontrollable, causing the vehicle to deviate from its intended path. Classification of Four-wheel Drive Systems: Four-wheel drive systems are primarily divided into two categories: part-time four-wheel drive and full-time four-wheel drive. Part-time four-wheel drive is the most commonly used system in four-wheel drive vehicles. It can operate in two modes: one is two-wheel drive, where only two wheels receive power, similar to a conventional vehicle.