2025 BMW Alpina B3 and B4 boost performance with GT grade

Alpina’s range of tuned BMWs offers serious performance but without the brash, in-your-face styling that comes with vehicles from BMW’s own M hot house. For the 3-Series and 4-Series, Alpina offers the respective B3 and B4 models featuring the same twin-turbocharged 3.0-liter inline-6 found in BMW’s own M3 and M4. In the Alpinas, the engine is…