2025 BMW Alpina B3 and B4 boost performance with GT grade

Alpina has introduced more powerful GT variants of its B3 and B4 models Output from the twin-turbo inline-6 has been cranked up to 522 hp Unfortunately, the Alpina B3 GT and B4 GT models are forbidden fruit in the U.S. Alpina’s range of tuned BMWs offers serious performance but without the brash, in-your-face styling that comes with vehicles from…