USA vs USA — 1957 vs 2008
| Bonneville 421 SD | G8 GXP 6.2 LS3 | |
|---|---|---|
| Horsepower | 405 hp | 415 hp |
| Torque | 425 lb-ft | 415 lb-ft |
| Engine Size | 6,899 cc | 6,162 cc |
| 0-60 mph | 5.4 sec | 4.7 sec |
| Top Speed | 140 mph | 170 mph |
| ¼ Mile | 13.9 sec | 12.9 sec |
| Weight | 3,900 lbs | 3,995 lbs |
| Wheelbase | 3,048 mm | 2,915 mm |
| Length | 5,486 mm | 4,979 mm |
| Units Produced | — | 1,829 |
| Original MSRP | $3,349 | $39,995 |
| Value (Excellent) | $150,000 | $60,000 |
| Collectibility | 8/10 | 7/10 |
| Rarity | 9/10 | 8/10 |
Numbers favor the 2008 Pontiac G8 GXP 6.2 LS3 with quicker acceleration, higher top speed, better value. The 1957 Pontiac Bonneville 421 SD offers stronger collectibility, and has its own devoted following. For those who let their heart decide, either car delivers a rewarding ownership experience.
Pontiac has long offered a diverse lineup, and comparing the 1957 Pontiac Bonneville 421 SD with the 2008 Pontiac G8 GXP 6.2 LS3 highlights the breadth of the marque's engineering philosophy. On paper, the two are remarkably close in power output, with the 1957 Pontiac Bonneville 421 SD producing 405 hp and the 2008 Pontiac G8 GXP 6.2 LS3 delivering 415 hp. In the sprint to 60 mph, the 2008 Pontiac G8 GXP 6.2 LS3 edges ahead at 4.7 seconds versus 5.4 seconds. Each of these machines offers a unique window into the era that produced it, making both worthy of consideration by collectors and drivers alike.