Australia vs USA — 1971 vs 1967
| HQ Monaro GTS 350 | GTX 440+6 | |
|---|---|---|
| Horsepower | 275 hp | 390 hp |
| Torque | 350 lb-ft | 490 lb-ft |
| Engine Size | 5,735 cc | 7,210 cc |
| 0-60 mph | 7.0 sec | 5.2 sec |
| Top Speed | 130 mph | 130 mph |
| ¼ Mile | 14.8 sec | 13.5 sec |
| Weight | 3,307 lbs | 3,800 lbs |
| Wheelbase | 2,768 mm | 2,946 mm |
| Length | 4,800 mm | 5,258 mm |
| Units Produced | — | 2,035 |
| Original MSRP | — | $3,733 |
| Value (Excellent) | $200,000 | $175,000 |
| Collectibility | 8/10 | 9/10 |
| Rarity | 6/10 | 8/10 |
The 1967 Plymouth GTX 440+6 emerges ahead in most objective measures, offering more power, quicker acceleration, stronger collectibility. The 1971 Holden HQ Monaro GTS 350 counters with lighter weight, but the numbers favor its rival. Still, both are remarkable machines, and the final choice often comes down to which driving experience speaks to you.
Putting the 1971 Holden HQ Monaro GTS 350 against the 1967 Plymouth GTX 440+6 is a comparison that enthusiasts have debated for decades. Each car reflects distinct design philosophies shaped by different automotive cultures — Australia versus USA. The 1967 Plymouth GTX 440+6 holds a clear advantage in raw power with 390 hp compared to 275 hp, a 115-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 GTX relies on a V8 OHV (440 Six Pack) with 7,210 cc. In the sprint to 60 mph, the 1967 Plymouth GTX 440+6 edges ahead at 5.2 seconds versus 7.0 seconds. The Holden HQ Monaro carries a weight advantage, tipping the scales 493 lbs lighter. Whether you prioritize driving dynamics, heritage, or aesthetic appeal, both contenders make a strong case for themselves.