USA vs USA — 1963 vs 1976
| Riviera 1st Generation | Regal Grand National | |
|---|---|---|
| Horsepower | 325 hp | 245 hp |
| Torque | 425 lb-ft | 355 lb-ft |
| Engine Size | 6,571 cc | 3,791 cc |
| 0-60 mph | 8.0 sec | 5.5 sec |
| Top Speed | 120 mph | 125 mph |
| ¼ Mile | 15.5 sec | 13.9 sec |
| Weight | — | 3,476 lbs |
| Wheelbase | 3,023 mm | 2,743 mm |
| Length | 5,334 mm | 5,067 mm |
| Units Produced | 40,000 | 20,193 |
| Original MSRP | — | $16,608 |
| Value (Excellent) | $65,000 | $75,000 |
| Collectibility | 5/10 | 9/10 |
| Rarity | 5/10 | 7/10 |
The 1976 Buick Regal Grand National emerges ahead in most objective measures, offering quicker acceleration, higher top speed, stronger collectibility. The 1963 Buick Riviera 1st Generation counters with more power, 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 Buick stable, the 1963 Buick Riviera 1st Generation and 1976 Buick Regal Grand National represent different approaches to performance and purpose. Both carry the Buick badge, yet each carves out its own distinct identity. The 1963 Buick Riviera 1st Generation holds a clear advantage in raw power with 325 hp compared to 245 hp, a 80-horsepower difference that shapes the driving experience. Under the hood, the contrast is notable: the Buick Riviera uses a V8 OHV displacing 6,571 cc, while the Buick Regal relies on a V6 Turbocharged with 3,791 cc. In the sprint to 60 mph, the 1976 Buick Regal Grand National edges ahead at 5.5 seconds versus 8.0 seconds. From a collectibility standpoint, the 1976 Buick Regal Grand National rates higher among enthusiasts and auction houses.