USA vs USA — 1970 vs 1958
| Chevelle SS 454 LS6 | Impala SS 409 | |
|---|---|---|
| Horsepower | 450 hp | 425 hp |
| Torque | 500 lb-ft | 425 lb-ft |
| Engine Size | 7,440 cc | 6,702 cc |
| 0-60 mph | 5.4 sec | 6.3 sec |
| Top Speed | 130 mph | 125 mph |
| ¼ Mile | 13.1 sec | 14.2 sec |
| Weight | 3,750 lbs | 3,800 lbs |
| Wheelbase | 2,845 mm | 2,997 mm |
| Length | 5,023 mm | 5,398 mm |
| Units Produced | 4,475 | — |
| Original MSRP | $3,835 | $3,261 |
| Value (Excellent) | $350,000 | $150,000 |
| Collectibility | 10/10 | 8/10 |
| Rarity | 8/10 | 7/10 |
On balance, the 1970 Chevrolet Chevelle SS 454 LS6 makes a stronger case on paper with quicker acceleration, higher top speed, stronger collectibility. However, the 1958 Chevrolet Impala SS 409 counters with better value, and its appeal extends beyond mere numbers. Choose the 1970 Chevrolet Chevelle SS 454 LS6 for outright capability, or the 1958 Chevrolet Impala SS 409 for a more distinctive ownership experience.
Chevrolet has long offered a diverse lineup, and comparing the 1970 Chevrolet Chevelle SS 454 LS6 with the 1958 Chevrolet Impala SS 409 highlights the breadth of the marque's engineering philosophy. The 1970 Chevrolet Chevelle SS 454 LS6 holds a clear advantage in raw power with 450 hp compared to 425 hp, a 25-horsepower difference that shapes the driving experience. Under the hood, the contrast is notable: the Chevrolet Chevelle uses a V8 OHV (LS6 big-block) displacing 7,440 cc, while the Chevrolet Impala relies on a V8 OHV (W-series big-block) with 6,702 cc. In the sprint to 60 mph, the 1970 Chevrolet Chevelle SS 454 LS6 edges ahead at 5.4 seconds versus 6.3 seconds. On the collector market, the 1970 Chevrolet Chevelle SS 454 LS6 commands a significant premium over the 1958 Chevrolet Impala SS 409, reflecting differences in prestige and rarity. From a collectibility standpoint, the 1970 Chevrolet Chevelle SS 454 LS6 rates higher among enthusiasts and auction houses.