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This is a special Head 2 Head presented by Tire Rack because we’re comparing two cars that look nearly identical on the outside. They’re both 600hp BMW 6-Series Gran Coupes, but the similarities between the B6 and M6 start to fade after that. The Alpina B6 is a well-rounded, incredibly fast luxury car with all-wheel drive, smooth suspension, and an eight-speed torque-converter automatic. The BMW M6 is a motorsports-bred, rear-wheel-drive monster with a seven-speed dual-clutch transmission, quick-ratio steering, and suspension that favors handling over ride quality. MOTOR TREND Senior Features Editors Jason Cammisa and Jonny Lieberman spend time with both to decide which makes the better Gran Coupe. Then, with the help of hall-of-fame race car driver Randy Pobst, we find out which four-door coupe is faster around the track. This episode has it all—burnouts, drag races, hot laps, and backseat drivers.