USA vs USA — 1970 vs 1967
| Rallye 350 310hp | GTX 440+6 | |
|---|---|---|
| Horsepower | 310 hp | 390 hp |
| Torque | 390 lb-ft | 490 lb-ft |
| Engine Size | 5,735 cc | 7,210 cc |
| 0-60 mph | 7.0 sec | 5.2 sec |
| Top Speed | 122 mph | 130 mph |
| ¼ Mile | 15.1 sec | 13.5 sec |
| Weight | 3,300 lbs | 3,800 lbs |
| Wheelbase | 2,845 mm | 2,946 mm |
| Length | 5,080 mm | 5,258 mm |
| Units Produced | 3,547 | 2,035 |
| Original MSRP | $3,253 | $3,733 |
| Value (Excellent) | $65,000 | $175,000 |
| Collectibility | 7/10 | 9/10 |
| Rarity | 8/10 | 8/10 |
The 1967 Plymouth GTX 440+6 emerges ahead in most objective measures, offering more power, quicker acceleration, higher top speed. The 1970 Oldsmobile Rallye 350 310hp counters with lighter weight, 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.
Among Muscle Car enthusiasts, the matchup between the 1970 Oldsmobile Rallye 350 310hp and 1967 Plymouth GTX 440+6 is one for the ages. These Muscle era machines competed directly for buyers' attention and continue to vie for collectors' affections today. The 1967 Plymouth GTX 440+6 holds a clear advantage in raw power with 390 hp compared to 310 hp, a 80-horsepower difference that shapes the driving experience. Under the hood, the contrast is notable: the Oldsmobile Rallye 350 uses a V8 OHV displacing 5,735 cc, while the Plymouth GTX relies on a V8 OHV (440 Six Pack) with 7,210 cc. In the sprint to 60 mph, the 1967 Plymouth GTX 440+6 edges ahead at 5.2 seconds versus 7.0 seconds. The Oldsmobile Rallye 350 carries a weight advantage, tipping the scales 500 lbs lighter. On the collector market, the 1967 Plymouth GTX 440+6 commands a significant premium over the 1970 Oldsmobile Rallye 350 310hp, reflecting differences in prestige and rarity. From a collectibility standpoint, the 1967 Plymouth GTX 440+6 rates higher among enthusiasts and auction houses.