Alpina B5 S Bi-Turbo

The Alpina B5 S Bi-Turbo was introduced in 2010 as an upgrade to the original B5. It features a more powerful 4.4L V8 Bi-Turbo engine producing 540 hp, paired with an 8-speed automatic transmission. This sedan variant is known for its impressive acceleration and handling capabilities, along with luxurious interior appointments that set it apart from standard 5 Series models.