The redesigned 2019 X5 is one of the best vehicles we've ever tested. The xDrive40i's smooth 335-hp, 3.0-liter six-cylinder turbo engine makes the X5 quick and easy to drive smoothly, yet it gets a decent 23 mpg overall. We don't think there is any reason to opt for the V8-powered xDrive50i. The ride is comfortable and impressively steady and composed. The impeccably finished, luxurious cabin is whisper quiet, and the seats are all-day comfortable. Handling isn't sporty but is very competent. Controls have an initial learning curve but prove to be logical once mastered, and the infotainment system works seamlessly.  An M50i version, with a 523-hp, turbo V8 engine, was new for 2020. The optional driving assistance suite includes adaptive cruise control and lane centering assistance, with automatic lane change with eye glance introduced in 2025.