The 745Li is about 5.2 inches longer than the 745i, which provides more legroom for rear-seat passengers. The 745Li also has a longer wheelbase, which improves ride quality and handling.
In addition to the size difference, the 745i and 745Li also have some different features. The 745Li comes standard with a panoramic sunroof, while the 745i does not. The 745Li also has a more powerful engine than the 745i. The 745Li is powered by a 4.4-liter twin-turbocharged V8 engine that produces 445 horsepower, while the 745i is powered by a 3.0-liter turbocharged inline-six engine that produces 320 horsepower.
Overall, the BMW 745i and 745Li are two very similar cars, but the 745Li offers more space and more features than the 745i.