USA vs USA — 1955 vs 1966
| Thunderbird | GT40 Mk I | |
|---|---|---|
| Horsepower | 198 hp | 380 hp |
| Torque | 286 lb-ft | 332 lb-ft |
| Engine Size | 4,785 cc | 4,736 cc |
| 0-60 mph | 9.5 sec | 5.3 sec |
| Top Speed | 115 mph | 200 mph |
| ¼ Mile | 17.0 sec | 12.5 sec |
| Weight | 3,050 lbs | — |
| Wheelbase | 2,565 mm | 2,413 mm |
| Length | 4,455 mm | 4,267 mm |
| Units Produced | 53,166 | 105 |
| Original MSRP | $2,944 | — |
| Value (Excellent) | $120,000 | $12,000,000 |
| Collectibility | 9/10 | 5/10 |
| Rarity | 6/10 | 10/10 |
The 1966 Ford GT40 Mk I emerges ahead in most objective measures, offering more power, quicker acceleration, higher top speed. The 1955 Ford Thunderbird counters with stronger collectibility, better value, 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.
Within the Ford stable, the 1955 Ford Thunderbird and 1966 Ford GT40 Mk I represent different approaches to performance and purpose. Both carry the Ford badge, yet each carves out its own distinct identity. The 1966 Ford GT40 Mk I holds a clear advantage in raw power with 380 hp compared to 198 hp, a 182-horsepower difference that shapes the driving experience. Under the hood, the contrast is notable: the Ford Thunderbird uses a V8 OHV (Y-block) displacing 4,785 cc, while the Ford GT40 relies on a V8 OHV 16V with 4,736 cc. In the sprint to 60 mph, the 1966 Ford GT40 Mk I edges ahead at 5.3 seconds versus 9.5 seconds. Rarity plays a significant role here — with only 105 units built, the 1966 Ford GT40 Mk I is considerably scarcer than the Ford Thunderbird's 53,166 examples. On the collector market, the 1966 Ford GT40 Mk I commands a significant premium over the 1955 Ford Thunderbird, reflecting differences in prestige and rarity. From a collectibility standpoint, the 1955 Ford Thunderbird rates higher among enthusiasts and auction houses.