USA vs USA — 1970 vs 1970
| AMX 390 Go Package | AMX 390 Big Bad | |
|---|---|---|
| Horsepower | 325 hp | 325 hp |
| Torque | 420 lb-ft | 425 lb-ft |
| Engine Size | 6,392 cc | 6,391 cc |
| 0-60 mph | 6.4 sec | 6.6 sec |
| Top Speed | 130 mph | 130 mph |
| ¼ Mile | 14.3 sec | 14.4 sec |
| Weight | — | 3,300 lbs |
| Wheelbase | 2,438 mm | 2,794 mm |
| Length | 4,572 mm | 4,877 mm |
| Units Produced | 4,116 | 4,116 |
| Original MSRP | — | $3,395 |
| Value (Excellent) | $90,000 | $65,000 |
| Collectibility | 5/10 | 8/10 |
| Rarity | 7/10 | 7/10 |
It's a closely fought contest. The 1970 AMC AMX 390 Go Package brings quicker acceleration to the table, and the 1970 AMC AMX 390 Big Bad answers with stronger collectibility, better value. Both are excellent machines that reward their owners in different ways — there's no wrong answer here.
Few model names carry as much weight as the AMC AMX. The 1970 and 1970 iterations represent different chapters in this storied nameplate's history, each reflecting the priorities and technologies of its era. On paper, the two are remarkably close in power output, with the 1970 AMC AMX 390 Go Package producing 325 hp and the 1970 AMC AMX 390 Big Bad delivering 325 hp. Under the hood, the contrast is notable: the AMC AMX uses a V8 OHV displacing 6,392 cc, while the AMC AMX relies on a V8 OHV (AMC 390) with 6,391 cc. In the sprint to 60 mph, the 1970 AMC AMX 390 Go Package edges ahead at 6.4 seconds versus 6.6 seconds. From a collectibility standpoint, the 1970 AMC AMX 390 Big Bad rates higher among enthusiasts and auction houses.