UK vs United Kingdom — 1957 vs 1973
| TR3A | Stag Mk II | |
|---|---|---|
| Horsepower | 100 hp | 145 hp |
| Torque | 122 lb-ft | 170 lb-ft |
| Engine Size | 1,991 cc | 2,997 cc |
| 0-60 mph | 10.8 sec | 9.3 sec |
| Top Speed | 105 mph | 116 mph |
| ¼ Mile | 17.7 sec | 17.2 sec |
| Weight | 2,100 lbs | 2,795 lbs |
| Wheelbase | 2,235 mm | 2,540 mm |
| Length | 3,835 mm | 4,445 mm |
| Units Produced | 58,236 | 25,877 |
| Original MSRP | $2,625 | $3,450 |
| Value (Excellent) | $65,000 | $45,000 |
| Collectibility | 7/10 | 10/10 |
| Rarity | 4/10 | 10/10 |
Numbers favor the 1973 Triumph Stag Mk II with more power, quicker acceleration, higher top speed. The 1957 Triumph TR3A offers lighter weight, and has its own devoted following. For those who let their heart decide, either car delivers a rewarding ownership experience.
Triumph has long offered a diverse lineup, and comparing the 1957 Triumph TR3A with the 1973 Triumph Stag Mk II highlights the breadth of the marque's engineering philosophy. The 1973 Triumph Stag Mk II holds a clear advantage in raw power with 145 hp compared to 100 hp, a 45-horsepower difference that shapes the driving experience. Under the hood, the contrast is notable: the Triumph TR3A uses a Inline-4 OHV 8V displacing 1,991 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 10.8 seconds. The Triumph TR3A carries a weight advantage, tipping the scales 695 lbs lighter. From a collectibility standpoint, the 1973 Triumph Stag Mk II rates higher among enthusiasts and auction houses.