In front-engine, rear-wheel drive unitized vehicles, the engine is mounted in which orientation?

In front-engine, rear-wheel drive unitized vehicles, the engine is typically mounted longitudinally. This orientation allows the engine's crankshaft to align with the drive shaft that transfers power to the rear wheels. A longitudinal engine layout is advantageous for performance and stability, as it provides a balanced weight distribution across the vehicle and helps maintain a lower center of gravity, which is critical for handling dynamics in sports and performance cars.

Additionally, this configuration facilitates better access for maintenance and repairs, as well as providing compatibility with larger engines that may be necessary for higher performance capabilities. The design also simplifies the relationship between the engine and transmission, which can help in creating a more efficient driveline system.

Other orientations, such as vertically or transversely, are less common in this type of vehicle setup, as they would not optimally align with the rear-wheel drive mechanics and could complicate the vehicle’s structure and performance.