The Duport Onyx was a French microcar built by ski-lift engineer Guy Duport in Faverges to keep his factory busy during summer off-seasons. Fewer than 20 examples were made from the late 1970s to the early 1990s, all powered by air-cooled Lombardini diesel engines: initially 325 cc, later 510 cc units producing 10–12 bhp.
Power went to the rear wheels via a belt-driven CVT, giving a top speed of around 45 km/h. With output under 4 kW, the Onyx qualified as “sans permis” and could be driven without a licence. Fuel consumption was about 3 l/100 km (roughly 80 mpg).
The chassis was simple welded steel, with bolt-on ribbed fiberglass body panels to save weight and resist rust. The interior was minimal: vinyl seats, basic Jaeger gauges, and a flat floor. Almost all cars stayed in France; one reached the US and is known from the Lane Motor Museum. Duport ended car production in the early 1990s as regulations and market conditions changed.



















