USA vs USA — 1971 vs 1967
| Road Runner 440+6 Air Grabber | Comet Cyclone GT | |
|---|---|---|
| Horsepower | 385 hp | 320 hp |
| Torque | 490 lb-ft | 450 lb-ft |
| Engine Size | 7,210 cc | 6,391 cc |
| 0-60 mph | 5.6 sec | 6.8 sec |
| Top Speed | 130 mph | 121 mph |
| ¼ Mile | 13.8 sec | 15.1 sec |
| Weight | 3,800 lbs | 3,450 lbs |
| Wheelbase | 2,946 mm | 2,972 mm |
| Length | 5,283 mm | 5,206 mm |
| Units Produced | 246 | 3,419 |
| Original MSRP | $3,547 | $2,848 |
| Value (Excellent) | $275,000 | $75,000 |
| Collectibility | 10/10 | 7/10 |
| Rarity | 10/10 | 7/10 |
The 1971 Plymouth Road Runner 440+6 Air Grabber holds an edge across most measurable criteria, offering more power, quicker acceleration, higher top speed. That said, the 1967 Mercury Comet Cyclone GT brings lighter weight, better value and remains a compelling choice for enthusiasts who value Mercury heritage. The right pick depends on whether you prioritize specifications or the intangible qualities that make a car truly special.
Among Muscle Car enthusiasts, the matchup between the 1971 Plymouth Road Runner 440+6 Air Grabber and 1967 Mercury Comet Cyclone GT is one for the ages. These Muscle era machines competed directly for buyers' attention and continue to vie for collectors' affections today. The 1971 Plymouth Road Runner 440+6 Air Grabber holds a clear advantage in raw power with 385 hp compared to 320 hp, a 65-horsepower difference that shapes the driving experience. In the sprint to 60 mph, the 1971 Plymouth Road Runner 440+6 Air Grabber edges ahead at 5.6 seconds versus 6.8 seconds. The Mercury Comet carries a weight advantage, tipping the scales 350 lbs lighter. Rarity plays a significant role here — with only 246 units built, the 1971 Plymouth Road Runner 440+6 Air Grabber is considerably scarcer than the Mercury Comet's 3,419 examples. On the collector market, the 1971 Plymouth Road Runner 440+6 Air Grabber commands a significant premium over the 1967 Mercury Comet Cyclone GT, reflecting differences in prestige and rarity. From a collectibility standpoint, the 1971 Plymouth Road Runner 440+6 Air Grabber rates higher among enthusiasts and auction houses.