USA vs USA — 1968 vs 1970
| Road Runner | Duster 340 | |
|---|---|---|
| Horsepower | 335 hp | 275 hp |
| Torque | 425 lb-ft | 350 lb-ft |
| Engine Size | 6,981 cc | 5,572 cc |
| 0-60 mph | 6.4 sec | 6.2 sec |
| Top Speed | 122 mph | 121 mph |
| ¼ Mile | 14.2 sec | 14.4 sec |
| Weight | 3,500 lbs | 3,048 lbs |
| Wheelbase | 2,946 mm | 2,743 mm |
| Length | 5,105 mm | 5,125 mm |
| Units Produced | 84,420 | — |
| Original MSRP | $2,896 | $2,547 |
| Value (Excellent) | $175,000 | $45,000 |
| Collectibility | 9/10 | 6/10 |
| Rarity | 5/10 | 5/10 |
Two outstanding machines, each with compelling strengths. The 1968 Plymouth Road Runner excels in more power, higher top speed, stronger collectibility, while the 1970 Plymouth Duster 340 stands out for quicker acceleration, lighter weight, better value. The best advice? Drive both if you can, then follow your instincts.
The 1968 Plymouth Road Runner and 1970 Plymouth Duster 340 share a manufacturer in Plymouth, but that's where the similarities get interesting. These two models reveal the versatility and ambition of the Plymouth brand. The 1968 Plymouth Road Runner holds a clear advantage in raw power with 335 hp compared to 275 hp, a 60-horsepower difference that shapes the driving experience. Under the hood, the contrast is notable: the Plymouth Road Runner uses a V8 OHV (RB big-block) displacing 6,981 cc, while the Plymouth Duster relies on a V8 OHV with 5,572 cc. In the sprint to 60 mph, the 1970 Plymouth Duster 340 edges ahead at 6.2 seconds versus 6.4 seconds. The Plymouth Duster carries a weight advantage, tipping the scales 452 lbs lighter. On the collector market, the 1968 Plymouth Road Runner commands a significant premium over the 1970 Plymouth Duster 340, reflecting differences in prestige and rarity. From a collectibility standpoint, the 1968 Plymouth Road Runner rates higher among enthusiasts and auction houses.