• 1981 Alpina BMW 3-Series built for Shell Kilometer Marathon

    The Detroit Auto Show last month marked the debut of the a car with the lowest coefficient of drag of any production car--just 0.23. That car was the Mercedes-Benz CLA, a small sport sedan powered by a gasoline engine. Efficiency figures haven't yet been released, but we can imagine it being quite frugal at highway speeds. If you've ever doubted the benefits of aerodynamics, then another German sedan from an earlier era demonstrates them pretty effectively. Jalopnik uncovered pictures of this 1981 Alpina BMW, built for a Shell Kilometer Marathon. Alpina is best known for its tuning work on...

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