USA vs USA — 1969 vs 1971
| Mustang Boss 429 | Road Runner 440+6 | |
|---|---|---|
| Horsepower | 375 hp | 385 hp |
| Torque | 450 lb-ft | 490 lb-ft |
| Engine Size | 7,030 cc | 7,210 cc |
| 0-60 mph | 6.8 sec | 5.7 sec |
| Top Speed | 122 mph | 130 mph |
| ¼ Mile | 14.1 sec | 13.8 sec |
| Weight | 3,540 lbs | 3,700 lbs |
| Wheelbase | 2,743 mm | 2,946 mm |
| Length | 4,775 mm | 5,258 mm |
| Units Produced | 1,358 | 902 |
| Original MSRP | $4,798 | $3,540 |
| Value (Excellent) | $600,000 | $150,000 |
| Collectibility | 10/10 | 9/10 |
| Rarity | 10/10 | 8/10 |
The 1971 Plymouth Road Runner 440+6 emerges ahead in most objective measures, offering quicker acceleration, higher top speed, better value. The 1969 Ford Mustang Boss 429 counters with stronger collectibility, 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.
Among Muscle Car enthusiasts, the matchup between the 1969 Ford Mustang Boss 429 and 1971 Plymouth Road Runner 440+6 is one for the ages. These Muscle era machines competed directly for buyers' attention and continue to vie for collectors' affections today. On paper, the two are remarkably close in power output, with the 1969 Ford Mustang Boss 429 producing 375 hp and the 1971 Plymouth Road Runner 440+6 delivering 385 hp. Under the hood, the contrast is notable: the Ford Mustang uses a V8 OHV (semi-hemispherical combustion chambers) displacing 7,030 cc, while the Plymouth Road Runner relies on a V8 OHV with 7,210 cc. In the sprint to 60 mph, the 1971 Plymouth Road Runner 440+6 edges ahead at 5.7 seconds versus 6.8 seconds. On the collector market, the 1969 Ford Mustang Boss 429 commands a significant premium over the 1971 Plymouth Road Runner 440+6, reflecting differences in prestige and rarity.