USA vs USA — 1965 vs 1973
| Riviera Gran Sport 425 | Grand Am 455 V8 | |
|---|---|---|
| Horsepower | 360 hp | 250 hp |
| Torque | 465 lb-ft | 390 lb-ft |
| Engine Size | 6,965 cc | 7,456 cc |
| 0-60 mph | 7.2 sec | 8.0 sec |
| Top Speed | 130 mph | 118 mph |
| ¼ Mile | 15.3 sec | 15.8 sec |
| Weight | 4,500 lbs | 4,100 lbs |
| Wheelbase | 3,073 mm | 2,845 mm |
| Length | 5,410 mm | 5,334 mm |
| Units Produced | 3,961 | 56,063 |
| Original MSRP | $4,424 | $4,353 |
| Value (Excellent) | $95,000 | $32,000 |
| Collectibility | 8/10 | 6/10 |
| Rarity | 7/10 | 5/10 |
On balance, the 1965 Buick Riviera Gran Sport 425 makes a stronger case on paper with more power, quicker acceleration, higher top speed. However, the 1973 Pontiac Grand Am 455 V8 counters with lighter weight, better value, and its appeal extends beyond mere numbers. Choose the 1965 Buick Riviera Gran Sport 425 for outright capability, or the 1973 Pontiac Grand Am 455 V8 for a more distinctive ownership experience.
In the world of Personal Luxury cars, few comparisons generate as much discussion as the 1965 Buick Riviera Gran Sport 425 versus the 1973 Pontiac Grand Am 455 V8. Both hail from Muscle era and represent the pinnacle of their respective manufacturers' ambitions. The 1965 Buick Riviera Gran Sport 425 holds a clear advantage in raw power with 360 hp compared to 250 hp, a 110-horsepower difference that shapes the driving experience. Under the hood, the contrast is notable: the Buick Riviera uses a V8 OHV (Buick 425 Nailhead) displacing 6,965 cc, while the Pontiac Grand Am relies on a V8 OHV (Pontiac 455) with 7,456 cc. In the sprint to 60 mph, the 1965 Buick Riviera Gran Sport 425 edges ahead at 7.2 seconds versus 8.0 seconds. The Pontiac Grand Am carries a weight advantage, tipping the scales 400 lbs lighter. Rarity plays a significant role here — with only 3,961 units built, the 1965 Buick Riviera Gran Sport 425 is considerably scarcer than the Pontiac Grand Am's 56,063 examples. On the collector market, the 1965 Buick Riviera Gran Sport 425 commands a significant premium over the 1973 Pontiac Grand Am 455 V8, reflecting differences in prestige and rarity. From a collectibility standpoint, the 1965 Buick Riviera Gran Sport 425 rates higher among enthusiasts and auction houses.