1968 Mercedes-Benz 300SEL 6.3 VS 1987 Buick Grand National and GNX

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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1987 Buick Grand National and GNX
With their 3.8-liter turbo V6s, the all-black Buicks ruled the street in the 1980s. They were also the first and only American muscle cars powered by something other than a big V8.
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