USA vs USA — 1973 vs 1966
| Trans Am SD-455 | Chevelle SS 396 L78 375hp | |
|---|---|---|
| Horsepower | 310 hp | 375 hp |
| Torque | — | 420 lb-ft |
| Engine Size | 7,456 cc | 6,489 cc |
| 0-60 mph | — | 5.8 sec |
| Top Speed | — | 130 mph |
| ¼ Mile | — | 14.0 sec |
| Weight | — | 3,400 lbs |
| Wheelbase | 2,746 mm | 2,946 mm |
| Length | 4,902 mm | 4,953 mm |
| Units Produced | 252 | — |
| Original MSRP | — | $2,980 |
| Value (Excellent) | $280,000 | $175,000 |
| Collectibility | 5/10 | 9/10 |
| Rarity | 10/10 | 8/10 |
The 1966 Chevrolet Chevelle SS 396 L78 375hp emerges ahead in most objective measures, offering more power, stronger collectibility, better value. The 1973 Pontiac Trans Am SD-455 counters with its unique character, 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 1973 Pontiac Trans Am SD-455 and 1966 Chevrolet Chevelle SS 396 L78 375hp stand as two of the most notable Muscle Car cars from Muscle era. Both emerged during a period of intense competition, and choosing between them remains a passionate debate among collectors. The 1966 Chevrolet Chevelle SS 396 L78 375hp holds a clear advantage in raw power with 375 hp compared to 310 hp, a 65-horsepower difference that shapes the driving experience. Under the hood, the contrast is notable: the Pontiac Trans Am uses a V8 displacing 7,456 cc, while the Chevrolet Chevelle SS 396 relies on a V8 OHV with 6,489 cc. From a collectibility standpoint, the 1966 Chevrolet Chevelle SS 396 L78 375hp rates higher among enthusiasts and auction houses.