USA vs USA — 1970 vs 1973
| Firebird Trans Am | Trans Am SD-455 | |
|---|---|---|
| Horsepower | 335 hp | 310 hp |
| Torque | 480 lb-ft | — |
| Engine Size | 7,456 cc | 7,456 cc |
| 0-60 mph | 5.4 sec | — |
| Top Speed | 130 mph | — |
| ¼ Mile | 13.5 sec | — |
| Weight | 3,500 lbs | — |
| Wheelbase | 2,743 mm | 2,746 mm |
| Length | 4,902 mm | 4,902 mm |
| Units Produced | 3,196 | 252 |
| Original MSRP | $4,305 | — |
| Value (Excellent) | $150,000 | $280,000 |
| Collectibility | 9/10 | 5/10 |
| Rarity | 5/10 | 10/10 |
Two outstanding machines, each with compelling strengths. The 1970 Pontiac Firebird Trans Am excels in stronger collectibility, better value, while the 1973 Pontiac Trans Am SD-455 stands out for greater rarity. The best advice? Drive both if you can, then follow your instincts.
The 1970 Pontiac Firebird Trans Am and 1973 Pontiac Trans Am SD-455 share a manufacturer in Pontiac, but that's where the similarities get interesting. These two models reveal the versatility and ambition of the Pontiac brand. The 1970 Pontiac Firebird Trans Am holds a clear advantage in raw power with 335 hp compared to 310 hp, a 25-horsepower difference that shapes the driving experience. Under the hood, the contrast is notable: the Pontiac Firebird uses a V8 OHV (Pontiac 455) displacing 7,456 cc, while the Pontiac Trans Am relies on a V8 with 7,456 cc. Rarity plays a significant role here — with only 252 units built, the 1973 Pontiac Trans Am SD-455 is considerably scarcer than the Pontiac Firebird's 3,196 examples. On the collector market, the 1973 Pontiac Trans Am SD-455 commands a significant premium over the 1970 Pontiac Firebird Trans Am, reflecting differences in prestige and rarity. From a collectibility standpoint, the 1970 Pontiac Firebird Trans Am rates higher among enthusiasts and auction houses.