4. BMW 540i (E39, 1997-2003)
The BMW E39 540i offers a unique blend of understated luxury and true V8 performance, making it a favorite among enthusiasts looking for a sleeper sedan. Equipped with a 4.4-liter V8 and available six-speed manual, it delivers impressive power while flying under the radar. Compared to the iconic M5, the 540i is significantly more affordable yet still provides much of the same driving enjoyment and refinement. For those seeking European sophistication without the sky-high price, the 540i is a standout choice. Read more in this Road & Track buyer’s guide.