Duesenberg Model SJ Supercharged
The Duesenberg Model SJ represented the pinnacle of American automotive engineering and luxury during the Great Depression era. Introduced in 1932 as a supercharged version of the already magnificent Model J, the SJ featured a centrifugal supercharger mounted on the massive 420 cubic inch straight-eight engine. This boosted output to an astounding 320 horsepower, making it the most powerful American production car of its time. Each SJ chassis was custom-bodied by America's finest coachbuilders including Murphy, LeBaron, and Rollston, with prices often exceeding $20,000 when fully completed.
Authenticity is critical with SJ models as many Model Js were later converted. Verify factory supercharger installation through documentation. These are multi-million dollar automobiles requiring expert inspection. Engine rebuilds are extremely expensive. Museum-quality examples command premium prices.
Only 36 factory-supercharged SJ models were produced between 1932 and 1935. Each car was custom-ordered and took months to complete. The supercharger was visible through chrome-plated external exhaust pipes. Several existing Model J cars were later retrofitted with superchargers by the factory or enthusiasts.