The most significant difference between front-wheel drive cars is the layout of the power unit (engine with transmission units). It is located in the engine compartment across the car, and the torque is transmitted to the front drive wheels directly from the differential using semi-axes with equal angular velocity joints. This eliminates the need for cardan transmission and rear axle mechanisms (like classic cars). With this arrangement, the most rational and compact connection of the power unit with the drive wheels is carried out.
The transmission of torque from the engine to the driving wheels of the car is carried out through the transmission, which includes the clutch, gearbox and front wheel drive. The gearbox is structurally integrated (in one crankcase) with main gear and differential and is attached through the clutch housing to the rear end of the engine block. Depending on the vehicle configuration, a four- or five-speed gearbox with different final drive ratios can be installed.