1973 Lamborghini Countach VS 1968 Mercedes-Benz 300SEL 6.3

1973 Lamborghini Countach
Defines "supercar," then and now. It was V12-powered, ludicrously impractical, stupidly fast and impossible to see out of. It also pioneered Lamborghini doors.
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1968 Mercedes-Benz 300SEL 6.3
A staid sedan stuffed with 6.3 liters of fuel-injected V8 making 247 hp. It was a German muscle sedan decades before they became common — AMG before AMG.
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