Australia vs USA — 1971 vs 1970
| HQ Monaro GTS 350 | Superbird 426 Hemi | |
|---|---|---|
| Horsepower | 275 hp | 425 hp |
| Torque | 350 lb-ft | 490 lb-ft |
| Engine Size | 5,735 cc | 6,981 cc |
| 0-60 mph | 7.0 sec | 5.5 sec |
| Top Speed | 130 mph | 140 mph |
| ¼ Mile | 14.8 sec | 13.5 sec |
| Weight | 3,307 lbs | 3,750 lbs |
| Wheelbase | 2,768 mm | 2,946 mm |
| Length | 4,800 mm | 5,639 mm |
| Units Produced | — | 1,920 |
| Original MSRP | — | $4,298 |
| Value (Excellent) | $200,000 | $500,000 |
| Collectibility | 8/10 | 10/10 |
| Rarity | 6/10 | 10/10 |
Numbers favor the 1970 Plymouth Superbird 426 Hemi with more power, quicker acceleration, higher top speed. The 1971 Holden HQ Monaro GTS 350 offers lighter weight, better value, and has its own devoted following. For those who let their heart decide, either car delivers a rewarding ownership experience.
The rivalry between Australia and USA automotive industries has produced legendary matchups, and the 1971 Holden HQ Monaro GTS 350 versus 1970 Plymouth Superbird 426 Hemi is among the most fascinating. These two cars represent the best of their national engineering schools. The 1970 Plymouth Superbird 426 Hemi holds a clear advantage in raw power with 425 hp compared to 275 hp, a 150-horsepower difference that shapes the driving experience. Under the hood, the contrast is notable: the Holden HQ Monaro uses a V8 OHV displacing 5,735 cc, while the Plymouth Superbird relies on a V8 OHV (426 Hemi) with 6,981 cc. In the sprint to 60 mph, the 1970 Plymouth Superbird 426 Hemi edges ahead at 5.5 seconds versus 7.0 seconds. The Holden HQ Monaro carries a weight advantage, tipping the scales 443 lbs lighter. On the collector market, the 1970 Plymouth Superbird 426 Hemi commands a significant premium over the 1971 Holden HQ Monaro GTS 350, reflecting differences in prestige and rarity. From a collectibility standpoint, the 1970 Plymouth Superbird 426 Hemi rates higher among enthusiasts and auction houses.