# 2018-2025 BMW M850i xDrive Convertible The M850i xDrive Convertible represents BMW's flagship grand tourer, combining luxury with serious performance. Powered by a twin-turbocharged 4.4-liter V8 producing 523 horsepower, it launches to 60 mph in 3.8 seconds while delivering all-weather confidence through standard xDrive all-wheel drive. Reviewers praise its refined highway demeanor, comfortable cabin with cutting-edge technology, and surprisingly athletic handling for a 4,600-pound convertible. However, criticisms include its hefty weight, high price (starting around $120,000), and less emotional driving experience compared to rivals like the Porsche 911 Cabriolet. It's famous for reviving BMW's 8 Series nameplate after two decades and offering a sophisticated alternative to traditional sports cars. Best suited for affluent buyers seeking a stylish, comfortable grand tourer for long-distance cruising with open-air enjoyment—not hardcore track enthusiasts.
The M850i features BMW's twin-turbo V8 requiring premium fuel and expensive synthetic oil changes. Carbon ceramic brakes (optional) cost $8,000-12,000 to replace. Complex retractable hardtop adds maintenance risk. Insurance runs high due to performance classification and replacement costs exceeding $100,000. Generally reliable but repairs are costly when needed.
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