UK vs UK — 1966 vs 1963
| GT6 Mk III | Herald 1200 Convertible | |
|---|---|---|
| Horsepower | 104 hp | 39 hp |
| Torque | 116 lb-ft | 55 lb-ft |
| Engine Size | 1,998 cc | 1,147 cc |
| 0-60 mph | 10.1 sec | 22.2 sec |
| Top Speed | 114 mph | 78 mph |
| ¼ Mile | 17.2 sec | — |
| Weight | 1,949 lbs | 1,848 lbs |
| Wheelbase | 2,108 mm | 2,311 mm |
| Length | 3,784 mm | 3,886 mm |
| Units Produced | 40,926 | 523,000 |
| Original MSRP | $3,100 | $1,699 |
| Value (Excellent) | $40,000 | $20,000 |
| Collectibility | 6/10 | 5/10 |
| Rarity | 6/10 | 3/10 |
On balance, the 1966 Triumph GT6 Mk III makes a stronger case on paper with more power, quicker acceleration, higher top speed. However, the 1963 Triumph Herald 1200 Convertible counters with lighter weight, better value, and its appeal extends beyond mere numbers. Choose the 1966 Triumph GT6 Mk III for outright capability, or the 1963 Triumph Herald 1200 Convertible for a more distinctive ownership experience.
Triumph has long offered a diverse lineup, and comparing the 1966 Triumph GT6 Mk III with the 1963 Triumph Herald 1200 Convertible highlights the breadth of the marque's engineering philosophy. The 1966 Triumph GT6 Mk III holds a clear advantage in raw power with 104 hp compared to 39 hp, a 65-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 Herald relies on a Inline-4 OHV with 1,147 cc. In the sprint to 60 mph, the 1966 Triumph GT6 Mk III edges ahead at 10.1 seconds versus 22.2 seconds. Rarity plays a significant role here — with only 40,926 units built, the 1966 Triumph GT6 Mk III is considerably scarcer than the Triumph Herald's 523,000 examples. On the collector market, the 1966 Triumph GT6 Mk III commands a significant premium over the 1963 Triumph Herald 1200 Convertible, reflecting differences in prestige and rarity.