USA vs USA — 1970 vs 1969
| AMX 390 Big Bad | Ambassador SST 390 V8 | |
|---|---|---|
| Horsepower | 325 hp | 315 hp |
| Torque | 425 lb-ft | 405 lb-ft |
| Engine Size | 6,391 cc | 6,392 cc |
| 0-60 mph | 6.6 sec | 8.5 sec |
| Top Speed | 130 mph | 118 mph |
| ¼ Mile | 14.4 sec | 16.0 sec |
| Weight | 3,300 lbs | 3,800 lbs |
| Wheelbase | 2,794 mm | 3,048 mm |
| Length | 4,877 mm | 5,182 mm |
| Units Produced | 4,116 | — |
| Original MSRP | $3,395 | $3,460 |
| Value (Excellent) | $65,000 | $22,000 |
| Collectibility | 8/10 | 5/10 |
| Rarity | 7/10 | 5/10 |
The 1970 AMC AMX 390 Big Bad holds an edge across most measurable criteria, offering quicker acceleration, higher top speed, lighter weight. That said, the 1969 AMC Ambassador SST 390 V8 brings better value and remains a compelling choice for enthusiasts who value AMC heritage. The right pick depends on whether you prioritize specifications or the intangible qualities that make a car truly special.
The 1970 AMC AMX 390 Big Bad and 1969 AMC Ambassador SST 390 V8 share a manufacturer in AMC, but that's where the similarities get interesting. These two models reveal the versatility and ambition of the AMC brand. On paper, the two are remarkably close in power output, with the 1970 AMC AMX 390 Big Bad producing 325 hp and the 1969 AMC Ambassador SST 390 V8 delivering 315 hp. In the sprint to 60 mph, the 1970 AMC AMX 390 Big Bad edges ahead at 6.6 seconds versus 8.5 seconds. The AMC AMX carries a weight advantage, tipping the scales 500 lbs lighter. On the collector market, the 1970 AMC AMX 390 Big Bad commands a significant premium over the 1969 AMC Ambassador SST 390 V8, reflecting differences in prestige and rarity. From a collectibility standpoint, the 1970 AMC AMX 390 Big Bad rates higher among enthusiasts and auction houses.