What is the difference between BMW 645 to 650?

The primary difference between the BMW 645 and 650 lies in their engine performance and power output. The BMW 645 is typically equipped with a less powerful engine compared to the 650, which features a more robust engine, often a turbocharged V8, resulting in higher horsepower and torque. Additionally, the 650 may come with more advanced features and technology options. Overall, the 650 is designed for a sportier driving experience compared to the 645.