Compare 2025 BMW 4 Series vs. 2026 BMW 5 Series

The 2025 BMW 4 Series and the 2026 BMW 5 Series are powered by a 2.0-liter BMW TwinPower Turbo inline 4-cylinder engine, which produces 255 horsepower. This makes them strong contenders for daily drives around O'Fallon and weekend getaways to O'Fallon, IL. The BMW 4 Series focuses on sporty agility. It has lightweight chassis components, a sharp suspension setup, and an 8-speed Sport Automatic transmission complete with paddle shifters and Launch Control. Drivers can tailor their experience with Driving Dynamics Control modes ECO PRO, COMFORT, and SPORT. This setup rewards a more engaged driving style. The BMW 5 Series offers a smooth and composed ride with the added benefit of a 48V mild hybrid system that provides eBoost for seamless acceleration and improved efficiency. Its refined suspension setup enhances comfort and stability, especially on longer commutes or highway cruising. The 8-speed STEPTRONIC Automatic transmission adapts to your habits thanks to Adaptive Transmission Control.

When it comes to technology, both sedans showcase BMW’s latest innovations in connectivity, navigation, and driver support. Both models feature the BMW Curved Display, a 12.3" digital instrument cluster alongside a 14.9" central touchscreen powered by BMW Operating System 8.5. You’ll also find Apple CarPlay®, Android Auto™, wireless device charging, and personal eSIM 5G connectivity in both models. However, the BMW 5 Series comes equipped with a Harman Kardon Premium Sound System for an elevated listening experience, while the BMW 4 Series features a HiFi Sound System with 10 speakers. Both support SiriusXM® with 360L and include BMW Remote Services and Connected Package Professional, which offer real-time traffic, on-street parking details (in select cities), and intelligent voice controls. If tech-driven convenience is a priority, you’ll appreciate both vehicles' remote features, over-the-air software updates, and app-based vehicle control.

Step inside the BMW 4 Series or 5 Series, and you’ll be greeted by premium materials, thoughtful design, and comfort-focused details. The BMW 4 Series features perforated SensaTec upholstery, Fineline Light Open Pore wood trim, and a sporty cabin feel that complements its performance-minded build. Heated front sport seats, power lumbar support, and ambient lighting make it just as comfortable as it is driver-focused. A two-way power moonroof and dual-zone climate control round out the upscale experience. The BMW 5 Series, with its Veganza upholstery and Fine Wood Dark Oak trim, leans more into luxury and long-distance comfort. The power front seats offer more adjustability, including side bolsters and thigh support, plus memory settings for both the seat and mirrors. The Travel and Comfort System adds thoughtful extras like USB-C charging ports in the front seatbacks, perfect for backseat passengers, and multifunction brackets for accessories like tablet holders. Both cabins are quiet, refined, and built for everyday indulgence. Still, the 5 Series offers more flexibility for those who often travel with passengers or prefer premium features at every turn.