USA vs USA — 1987 vs 1980
| Allante Convertible | Seville STS Bustleback | |
|---|---|---|
| Horsepower | 295 hp | 135 hp |
| Torque | 290 lb-ft | 205 lb-ft |
| Engine Size | 4,565 cc | 4,087 cc |
| 0-60 mph | 6.4 sec | 13.5 sec |
| Top Speed | 150 mph | 107 mph |
| ¼ Mile | 14.9 sec | 19.5 sec |
| Weight | 3,650 lbs | 3,900 lbs |
| Wheelbase | 2,525 mm | 2,895 mm |
| Length | 4,531 mm | 5,182 mm |
| Units Produced | 21,430 | — |
| Original MSRP | $57,183 | $21,490 |
| Value (Excellent) | $38,000 | $18,000 |
| Collectibility | 6/10 | 4/10 |
| Rarity | 6/10 | 3/10 |
The 1987 Cadillac Allante Convertible holds an edge across most measurable criteria, offering more power, quicker acceleration, higher top speed. That said, the 1980 Cadillac Seville STS Bustleback brings better value and remains a compelling choice for enthusiasts who value Cadillac heritage. The right pick depends on whether you prioritize specifications or the intangible qualities that make a car truly special.
Within the Cadillac stable, the 1987 Cadillac Allante Convertible and 1980 Cadillac Seville STS Bustleback represent different approaches to performance and purpose. Both carry the Cadillac badge, yet each carves out its own distinct identity. The 1987 Cadillac Allante Convertible holds a clear advantage in raw power with 295 hp compared to 135 hp, a 160-horsepower difference that shapes the driving experience. Under the hood, the contrast is notable: the Cadillac Allante uses a V8 OHV displacing 4,565 cc, while the Cadillac Seville relies on a V8 OHV (Cadillac L62 HT4100) with 4,087 cc. In the sprint to 60 mph, the 1987 Cadillac Allante Convertible edges ahead at 6.4 seconds versus 13.5 seconds. The Cadillac Allante carries a weight advantage, tipping the scales 250 lbs lighter. On the collector market, the 1987 Cadillac Allante Convertible commands a significant premium over the 1980 Cadillac Seville STS Bustleback, reflecting differences in prestige and rarity. From a collectibility standpoint, the 1987 Cadillac Allante Convertible rates higher among enthusiasts and auction houses.