USA vs USA — 1963 vs 1970
| Riviera 425 Nailhead | Cutlass Supreme SX 455 | |
|---|---|---|
| Horsepower | 340 hp | 320 hp |
| Torque | 465 lb-ft | 460 lb-ft |
| Engine Size | 6,965 cc | 7,456 cc |
| 0-60 mph | 7.7 sec | 7.0 sec |
| Top Speed | 125 mph | 120 mph |
| ¼ Mile | 15.5 sec | 15.2 sec |
| Weight | 4,200 lbs | 3,750 lbs |
| Wheelbase | 3,048 mm | 2,845 mm |
| Length | 5,334 mm | 5,182 mm |
| Units Produced | 40,000 | 16,833 |
| Original MSRP | $4,333 | $3,551 |
| Value (Excellent) | $85,000 | $65,000 |
| Collectibility | 8/10 | 7/10 |
| Rarity | 5/10 | 5/10 |
It's a closely fought contest. The 1963 Buick Riviera 425 Nailhead brings higher top speed, stronger collectibility to the table, and the 1970 Oldsmobile Cutlass Supreme SX 455 answers with quicker acceleration, lighter weight, greater rarity. Both are excellent machines that reward their owners in different ways — there's no wrong answer here.
In the world of Personal Luxury cars, few comparisons generate as much discussion as the 1963 Buick Riviera 425 Nailhead versus the 1970 Oldsmobile Cutlass Supreme SX 455. Both hail from Muscle era and represent the pinnacle of their respective manufacturers' ambitions. The 1963 Buick Riviera 425 Nailhead holds a clear advantage in raw power with 340 hp compared to 320 hp, a 20-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 Oldsmobile Cutlass Supreme relies on a V8 OHV (Oldsmobile 455) with 7,456 cc. In the sprint to 60 mph, the 1970 Oldsmobile Cutlass Supreme SX 455 edges ahead at 7.0 seconds versus 7.7 seconds. The Oldsmobile Cutlass Supreme carries a weight advantage, tipping the scales 450 lbs lighter. Both trade at comparable values on the collector market, making the choice between them largely one of personal preference.