3. 1956 Saab Sonett
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Designed to launch Saab onto the racing scene, the Sonett used an aircraft-inspired unibody construction along with fibreglass reinforced plastic. As a result, it weighed a mere 500 kilos.
Despite a modest 57.5-horsepower, 2-stroke, 3-cylinder mill borrowed from the 93 sedan, the two-seater’s light weight and rigid chassis helped legendary driver Erik Carlsson shine on the track.
Oh, by the way, Sonett is Swedish for ''how nice.''