Volvo went to four-wheel disc brakes long before most of the rest of the industry, with every Volvo 140 coming with a high-performance safety-enhancing disc stopper at each corner going back to 1966. By 1974, most Detroit cars still had drum brakes in back, and a few had fade-happy drums all the way around; this seemed to offer a good advertising opportunity for safety-centric Volvo. Here’s a magazine advertisement from July, 1974, explaining why discs and brake proportioning valves keep you safe.

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