USA vs USA — 1928 vs 1929
| Model J Model J Dual-Cowl Phaeton | Model SJ Supercharged | |
|---|---|---|
| Horsepower | 265 hp | 320 hp |
| Torque | 380 lb-ft | 490 lb-ft |
| Engine Size | 6,882 cc | 6,882 cc |
| 0-60 mph | 13.0 sec | 8.0 sec |
| Top Speed | 116 mph | 135 mph |
| ¼ Mile | 0.0 sec | — |
| Weight | — | 5,500 lbs |
| Wheelbase | 3,607 mm | 3,658 mm |
| Length | 5,690 mm | 5,588 mm |
| Units Produced | 481 | 36 |
| Original MSRP | — | $13,000 |
| Value (Excellent) | $5,000,000 | $8,000,000 |
| Collectibility | 5/10 | 10/10 |
| Rarity | 10/10 | 10/10 |
The 1929 Duesenberg Model SJ Supercharged emerges ahead in most objective measures, offering more power, quicker acceleration, higher top speed. The 1928 Duesenberg Model J Model J Dual-Cowl Phaeton counters with better value, but the numbers favor its rival. Still, both are remarkable machines, and the final choice often comes down to which driving experience speaks to you.
Tracing the evolution of the Duesenberg Model J from 1928 to 1929 offers a compelling look at how automotive design and engineering progressed. These two variants showcase the changing face of Duesenberg. The 1929 Duesenberg Model SJ Supercharged holds a clear advantage in raw power with 320 hp compared to 265 hp, a 55-horsepower difference that shapes the driving experience. Under the hood, the contrast is notable: the Duesenberg Model J uses a Inline-8 DOHC 32V displacing 6,882 cc, while the Duesenberg Model SJ relies on a Straight-8 Supercharged with 6,882 cc. In the sprint to 60 mph, the 1929 Duesenberg Model SJ Supercharged edges ahead at 8.0 seconds versus 13.0 seconds. Rarity plays a significant role here — with only 36 units built, the 1929 Duesenberg Model SJ Supercharged is considerably scarcer than the Duesenberg Model J's 481 examples. On the collector market, the 1929 Duesenberg Model SJ Supercharged commands a significant premium over the 1928 Duesenberg Model J Model J Dual-Cowl Phaeton, reflecting differences in prestige and rarity. From a collectibility standpoint, the 1929 Duesenberg Model SJ Supercharged rates higher among enthusiasts and auction houses.