UK vs United Kingdom — 1968 vs 1973
| TR6 PI (Fuel Injection) | Stag Mk II | |
|---|---|---|
| Horsepower | 150 hp | 145 hp |
| Torque | 165 lb-ft | 170 lb-ft |
| Engine Size | 2,498 cc | 2,997 cc |
| 0-60 mph | 8.2 sec | 9.3 sec |
| Top Speed | 120 mph | 116 mph |
| ¼ Mile | 16.0 sec | 17.2 sec |
| Weight | 2,463 lbs | 2,795 lbs |
| Wheelbase | 2,235 mm | 2,540 mm |
| Length | 3,962 mm | 4,445 mm |
| Units Produced | 91,850 | 25,877 |
| Original MSRP | $3,595 | $3,450 |
| Value (Excellent) | $65,000 | $45,000 |
| Collectibility | 7/10 | 10/10 |
| Rarity | 4/10 | 10/10 |
It's a closely fought contest. The 1968 Triumph TR6 PI (Fuel Injection) brings quicker acceleration, higher top speed, lighter weight to the table, and the 1973 Triumph Stag Mk II answers with greater rarity, stronger collectibility. Both are excellent machines that reward their owners in different ways — there's no wrong answer here.
Triumph has long offered a diverse lineup, and comparing the 1968 Triumph TR6 PI (Fuel Injection) with the 1973 Triumph Stag Mk II highlights the breadth of the marque's engineering philosophy. On paper, the two are remarkably close in power output, with the 1968 Triumph TR6 PI (Fuel Injection) producing 150 hp and the 1973 Triumph Stag Mk II delivering 145 hp. Under the hood, the contrast is notable: the Triumph TR6 uses a Inline-6 OHV displacing 2,498 cc, while the Triumph Stag relies on a 3.0L V8 with 2,997 cc. In the sprint to 60 mph, the 1968 Triumph TR6 PI (Fuel Injection) edges ahead at 8.2 seconds versus 9.3 seconds. The Triumph TR6 carries a weight advantage, tipping the scales 332 lbs lighter. Rarity plays a significant role here — with only 25,877 units built, the 1973 Triumph Stag Mk II is considerably scarcer than the Triumph TR6's 91,850 examples. From a collectibility standpoint, the 1973 Triumph Stag Mk II rates higher among enthusiasts and auction houses.