By fitting a so-called radial compressor, which Alpina describes as a combination of turbocharger and supercharger, the DOHC 4.4-liter V8 is nudged to 530 horsepower and 535 pound-feet of torque. All that power is fed to the rear wheels through a modified ZF six-speed automatic gearbox with Alpina Switch-tronic clutchless manual shift capability.
The results are impressive. The B6 S coupe sprints from zero to 60 mph in less than 4.5 seconds, with a top speed of 198 mph, while the B6 S cabrio does the 0-60-mph run in under 4.8 seconds, with a top speed of 194 mph.
The mechanical underpinnings have been massaged in typical Alpina fashion. The B6 S gets an electronically controlled adjustable damping system, jointly developed with Sachs. The driver can manually select firmer damper settings via a button on the center console. There are also enhanced brakes and heavier stabilizer bars. The car rides on 20-inch wheels and tires.
Aerodynamic improvements include a lightweight carbon-fiber hood with integral air outlets.
What this means to you: The B6 S bumps the 6 Series performance bar a tad higher.

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