USA vs USA — 1970 vs 1979
| AMX 390 Go Package | Eagle SX/4 Liftback | |
|---|---|---|
| Horsepower | 325 hp | 110 hp |
| Torque | 420 lb-ft | 205 lb-ft |
| Engine Size | 6,392 cc | 4,228 cc |
| 0-60 mph | 6.4 sec | 13.5 sec |
| Top Speed | 130 mph | 100 mph |
| ¼ Mile | 14.3 sec | 19.2 sec |
| Weight | — | 3,250 lbs |
| Wheelbase | 2,438 mm | 2,578 mm |
| Length | 4,572 mm | 4,547 mm |
| Units Produced | 4,116 | 197,060 |
| Original MSRP | — | $7,995 |
| Value (Excellent) | $90,000 | $18,000 |
| Collectibility | 5/10 | 6/10 |
| Rarity | 7/10 | 6/10 |
On balance, the 1970 AMC AMX 390 Go Package makes a stronger case on paper with more power, quicker acceleration, higher top speed. However, the 1979 AMC Eagle SX/4 Liftback counters with stronger collectibility, better value, and its appeal extends beyond mere numbers. Choose the 1970 AMC AMX 390 Go Package for outright capability, or the 1979 AMC Eagle SX/4 Liftback for a more distinctive ownership experience.
AMC has long offered a diverse lineup, and comparing the 1970 AMC AMX 390 Go Package with the 1979 AMC Eagle SX/4 Liftback highlights the breadth of the marque's engineering philosophy. The 1970 AMC AMX 390 Go Package holds a clear advantage in raw power with 325 hp compared to 110 hp, a 215-horsepower difference that shapes the driving experience. Under the hood, the contrast is notable: the AMC AMX uses a V8 OHV displacing 6,392 cc, while the AMC Eagle relies on a Inline-6 OHV with 4,228 cc. In the sprint to 60 mph, the 1970 AMC AMX 390 Go Package edges ahead at 6.4 seconds versus 13.5 seconds. Rarity plays a significant role here — with only 4,116 units built, the 1970 AMC AMX 390 Go Package is considerably scarcer than the AMC Eagle's 197,060 examples. On the collector market, the 1970 AMC AMX 390 Go Package commands a significant premium over the 1979 AMC Eagle SX/4 Liftback, reflecting differences in prestige and rarity.