USA vs USA — 1984 vs 1961
| Grand National GNX | Skylark GS 400 | |
|---|---|---|
| Horsepower | 276 hp | 340 hp |
| Torque | 360 lb-ft | 430 lb-ft |
| Engine Size | 3,791 cc | 6,555 cc |
| 0-60 mph | 4.7 sec | 6.8 sec |
| Top Speed | 125 mph | 121 mph |
| ¼ Mile | 13.4 sec | 14.8 sec |
| Weight | 3,500 lbs | 3,550 lbs |
| Wheelbase | 2,743 mm | 2,946 mm |
| Length | 5,059 mm | 5,156 mm |
| Units Produced | 547 | — |
| Original MSRP | $29,290 | $3,019 |
| Value (Excellent) | $300,000 | $55,000 |
| Collectibility | 10/10 | 7/10 |
| Rarity | 9/10 | 6/10 |
It's a closely fought contest. The 1984 Buick Grand National GNX brings quicker acceleration, higher top speed, stronger collectibility to the table, and the 1961 Buick Skylark GS 400 answers with more power, better value. Both are excellent machines that reward their owners in different ways — there's no wrong answer here.
Buick has long offered a diverse lineup, and comparing the 1984 Buick Grand National GNX with the 1961 Buick Skylark GS 400 highlights the breadth of the marque's engineering philosophy. The 1961 Buick Skylark GS 400 holds a clear advantage in raw power with 340 hp compared to 276 hp, a 64-horsepower difference that shapes the driving experience. Under the hood, the contrast is notable: the Buick Grand National uses a V6 OHV Turbocharged (Buick 3.8L) displacing 3,791 cc, while the Buick Skylark relies on a V8 OHV with 6,555 cc. In the sprint to 60 mph, the 1984 Buick Grand National GNX edges ahead at 4.7 seconds versus 6.8 seconds. On the collector market, the 1984 Buick Grand National GNX commands a significant premium over the 1961 Buick Skylark GS 400, reflecting differences in prestige and rarity. From a collectibility standpoint, the 1984 Buick Grand National GNX rates higher among enthusiasts and auction houses.