USA vs USA — 1969 vs 1971
| Mustang Boss 429 | Demon 340 | |
|---|---|---|
| Horsepower | 375 hp | 275 hp |
| Torque | 450 lb-ft | 340 lb-ft |
| Engine Size | 7,030 cc | 5,572 cc |
| 0-60 mph | 6.8 sec | 6.5 sec |
| Top Speed | 122 mph | 123 mph |
| ¼ Mile | 14.1 sec | 14.5 sec |
| Weight | 3,540 lbs | 3,100 lbs |
| Wheelbase | 2,743 mm | 2,743 mm |
| Length | 4,775 mm | 4,928 mm |
| Units Produced | 1,358 | 10,098 |
| Original MSRP | $4,798 | $2,721 |
| Value (Excellent) | $600,000 | $80,000 |
| Collectibility | 10/10 | 7/10 |
| Rarity | 10/10 | 7/10 |
This matchup is remarkably close. The 1969 Ford Mustang Boss 429 offers more power, greater rarity, stronger collectibility, while the 1971 Dodge Demon 340 counters with quicker acceleration, higher top speed, lighter weight. Neither holds a decisive advantage, making this a true enthusiast's dilemma. Your choice ultimately depends on which driving philosophy resonates more with you.
The 1969 Ford Mustang Boss 429 and 1971 Dodge Demon 340 stand as two of the most notable Muscle Car cars from Muscle era. Both emerged during a period of intense competition, and choosing between them remains a passionate debate among collectors. The 1969 Ford Mustang Boss 429 holds a clear advantage in raw power with 375 hp compared to 275 hp, a 100-horsepower difference that shapes the driving experience. Under the hood, the contrast is notable: the Ford Mustang uses a V8 OHV (semi-hemispherical combustion chambers) displacing 7,030 cc, while the Dodge Demon relies on a V8 OHV with 5,572 cc. In the sprint to 60 mph, the 1971 Dodge Demon 340 edges ahead at 6.5 seconds versus 6.8 seconds. The Dodge Demon carries a weight advantage, tipping the scales 440 lbs lighter. Rarity plays a significant role here — with only 1,358 units built, the 1969 Ford Mustang Boss 429 is considerably scarcer than the Dodge Demon's 10,098 examples. On the collector market, the 1969 Ford Mustang Boss 429 commands a significant premium over the 1971 Dodge Demon 340, reflecting differences in prestige and rarity. From a collectibility standpoint, the 1969 Ford Mustang Boss 429 rates higher among enthusiasts and auction houses.