The Moskvich 404 Sport was a prototype automobile from Soviet manufacturer Moskvitch, introduced in 1954.
The "stunning" 404 Sport used a new, experimental overhead valve hemi engine, with a compression ratio of 9.2:1, which produced 58 hp (43 kW; 59 PS). Fitted with four sidedraft carburettors, the 404's top speed was 91 mph (146 km/h), enough to make it Soviet champion three times.
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