USA vs USA — 1968 vs 1979
| AMX | Eagle SX/4 Liftback | |
|---|---|---|
| Horsepower | 315 hp | 110 hp |
| Torque | 403 lb-ft | 205 lb-ft |
| Engine Size | 6,393 cc | 4,228 cc |
| 0-60 mph | 6.6 sec | 13.5 sec |
| Top Speed | 125 mph | 100 mph |
| ¼ Mile | 14.3 sec | 19.2 sec |
| Weight | — | 3,250 lbs |
| Wheelbase | 2,388 mm | 2,578 mm |
| Length | 4,450 mm | 4,547 mm |
| Units Produced | 6,725 | 197,060 |
| Original MSRP | — | $7,995 |
| Value (Excellent) | $75,000 | $18,000 |
| Collectibility | 5/10 | 6/10 |
| Rarity | 6/10 | 6/10 |
On balance, the 1968 AMC AMX 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 1968 AMC AMX 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 1968 AMC AMX with the 1979 AMC Eagle SX/4 Liftback highlights the breadth of the marque's engineering philosophy. The 1968 AMC AMX holds a clear advantage in raw power with 315 hp compared to 110 hp, a 205-horsepower difference that shapes the driving experience. Under the hood, the contrast is notable: the AMC AMX uses a V8 OHV 16V displacing 6,393 cc, while the AMC Eagle relies on a Inline-6 OHV with 4,228 cc. In the sprint to 60 mph, the 1968 AMC AMX edges ahead at 6.6 seconds versus 13.5 seconds. Rarity plays a significant role here — with only 6,725 units built, the 1968 AMC AMX is considerably scarcer than the AMC Eagle's 197,060 examples. On the collector market, the 1968 AMC AMX commands a significant premium over the 1979 AMC Eagle SX/4 Liftback, reflecting differences in prestige and rarity.