What is the difference between mechanical four-wheel drive and electronic four-wheel drive?

[MacJesse]

Mechanical four-wheel drive and electronic four-wheel drive mainly differ in the following aspects: 1. Quality: Traditional mechanical four-wheel drive has a simple structure, reliable performance and quality, can withstand heavy loads, can cope with bad roads for a long time, and has low maintenance costs. The biggest advantage of electronic four-wheel drive is its extremely fast response speed, low price, comfort and energy saving, but it is generally only suitable for urban and highway driving, and its reliability is not as good as mechanical four-wheel drive. 2. Fuel: In terms of fuel vehicles, current urban SUVs need to consider fuel economy, so most models adopt on-demand four-wheel drive. In terms of electric vehicles, because they do not need mechanical devices such as drive shafts, their four-wheel drive is controlled by motors.