Benz Patent Motorwagen - Power

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The Patent Motorwagen is harrowing to drive even with a 10-mile-an-hour top speed. I sat up high on a shaky bench with only vague speed control. Karl Benz's single cylinder four-stroke engine produces 0.75 horsepower, so tackling even the slightest hill requires building up speed.

First published May 2, 2016: 9:34 AM ET