UK vs United Kingdom — 1966 vs 1973
| GT6 Mk III | Stag Mk II | |
|---|---|---|
| Horsepower | 104 hp | 145 hp |
| Torque | 116 lb-ft | 170 lb-ft |
| Engine Size | 1,998 cc | 2,997 cc |
| 0-60 mph | 10.1 sec | 9.3 sec |
| Top Speed | 114 mph | 116 mph |
| ¼ Mile | 17.2 sec | 17.2 sec |
| Weight | 1,949 lbs | 2,795 lbs |
| Wheelbase | 2,108 mm | 2,540 mm |
| Length | 3,784 mm | 4,445 mm |
| Units Produced | 40,926 | 25,877 |
| Original MSRP | $3,100 | $3,450 |
| Value (Excellent) | $40,000 | $45,000 |
| Collectibility | 6/10 | 10/10 |
| Rarity | 6/10 | 10/10 |
The 1973 Triumph Stag Mk II emerges ahead in most objective measures, offering more power, quicker acceleration, higher top speed. The 1966 Triumph GT6 Mk III 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.
The 1966 Triumph GT6 Mk III and 1973 Triumph Stag Mk II share a manufacturer in Triumph, but that's where the similarities get interesting. These two models reveal the versatility and ambition of the Triumph brand. The 1973 Triumph Stag Mk II holds a clear advantage in raw power with 145 hp compared to 104 hp, a 41-horsepower difference that shapes the driving experience. Under the hood, the contrast is notable: the Triumph GT6 uses a Inline-6 OHV displacing 1,998 cc, while the Triumph Stag relies on a 3.0L V8 with 2,997 cc. In the sprint to 60 mph, the 1973 Triumph Stag Mk II edges ahead at 9.3 seconds versus 10.1 seconds. The Triumph GT6 carries a weight advantage, tipping the scales 846 lbs lighter. Both trade at comparable values on the collector market, making the choice between them largely one of personal preference. From a collectibility standpoint, the 1973 Triumph Stag Mk II rates higher among enthusiasts and auction houses.