1991 Alpina B10 Bi Turbo

• Bases on 1991 BMW 535 

• E34 chassis code 

• Paul Frere F1 driver and journalist called it  "the best 4 door in the world"

• Worlds fastest 4 door in 1991 going 180 mph 

• 507 built-in total

• 3.5-liter twin-turbo "Bi-Turbo"

• 360hp 

• 384 lbs tq 

• Cockpit adjustable boost control 

• Alpina certification papers