Alpina’s next model up is the B4 Coupe Bi-Turbo and it was spotted testing on the Ring. If it comes with the same powerplant as the B3, it will deliver at least 410 hp and 443 lb-ft of torque from a twin turbo inline 6 motor.
Cosmetic upgrades remain subtle, as Alpina always does. It includes a small front lip spoiler, color matched air breather vent trim, classic 21 spoke Alpina wheels, trunk spoiler, rear diffuser, lower suspension and quad exhaust tips.
The Alpina B4 is expected to make its debut at the upcoming 2014 Geneva auto show in March 2014.
Source: Bimmerpost