USA vs USA — 1970 vs 1973
| Firebird Trans Am | Grand Am 455 V8 | |
|---|---|---|
| Horsepower | 335 hp | 250 hp |
| Torque | 480 lb-ft | 390 lb-ft |
| Engine Size | 7,456 cc | 7,456 cc |
| 0-60 mph | 5.4 sec | 8.0 sec |
| Top Speed | 130 mph | 118 mph |
| ¼ Mile | 13.5 sec | 15.8 sec |
| Weight | 3,500 lbs | 4,100 lbs |
| Wheelbase | 2,743 mm | 2,845 mm |
| Length | 4,902 mm | 5,334 mm |
| Units Produced | 3,196 | 56,063 |
| Original MSRP | $4,305 | $4,353 |
| Value (Excellent) | $150,000 | $32,000 |
| Collectibility | 9/10 | 6/10 |
| Rarity | 5/10 | 5/10 |
The 1970 Pontiac Firebird Trans Am holds an edge across most measurable criteria, offering more power, quicker acceleration, higher top speed. That said, the 1973 Pontiac Grand Am 455 V8 brings better value and remains a compelling choice for enthusiasts who value Pontiac heritage. The right pick depends on whether you prioritize specifications or the intangible qualities that make a car truly special.
The 1970 Pontiac Firebird Trans Am and 1973 Pontiac Grand Am 455 V8 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 250 hp, a 85-horsepower difference that shapes the driving experience. In the sprint to 60 mph, the 1970 Pontiac Firebird Trans Am edges ahead at 5.4 seconds versus 8.0 seconds. The Pontiac Firebird carries a weight advantage, tipping the scales 600 lbs lighter. Rarity plays a significant role here — with only 3,196 units built, the 1970 Pontiac Firebird Trans Am is considerably scarcer than the Pontiac Grand Am's 56,063 examples. On the collector market, the 1970 Pontiac Firebird Trans Am commands a significant premium over the 1973 Pontiac Grand Am 455 V8, reflecting differences in prestige and rarity. From a collectibility standpoint, the 1970 Pontiac Firebird Trans Am rates higher among enthusiasts and auction houses.