Japan vs Germany — 1975 vs 1978
| Cosmo AP Limited | 928 4.5 | |
|---|---|---|
| Horsepower | 135 hp | 240 hp |
| Torque | 134 lb-ft | 273 lb-ft |
| Engine Size | 1,308 cc | 4,474 cc |
| 0-60 mph | 9.0 sec | 6.8 sec |
| Top Speed | 121 mph | 143 mph |
| ¼ Mile | 16.5 sec | 15.1 sec |
| Weight | 2,469 lbs | 3,197 lbs |
| Wheelbase | 2,510 mm | 2,500 mm |
| Length | 4,545 mm | 4,445 mm |
| Units Produced | — | 15,800 |
| Original MSRP | — | $28,500 |
| Value (Excellent) | $50,000 | $55,000 |
| Collectibility | 7/10 | 8/10 |
| Rarity | 8/10 | 6/10 |
The 1978 Porsche 928 4.5 emerges ahead in most objective measures, offering more power, quicker acceleration, higher top speed. The 1975 Mazda Cosmo AP Limited counters with lighter weight, better value, but the numbers favor its rival. Still, both are remarkable machines, and the final choice often comes down to which driving experience speaks to you.
Putting the 1975 Mazda Cosmo AP Limited against the 1978 Porsche 928 4.5 is a comparison that enthusiasts have debated for decades. Each car reflects distinct design philosophies shaped by different automotive cultures — Japan versus Germany. The 1978 Porsche 928 4.5 holds a clear advantage in raw power with 240 hp compared to 135 hp, a 105-horsepower difference that shapes the driving experience. Under the hood, the contrast is notable: the Mazda Cosmo AP uses a Twin-rotor Wankel (13B) displacing 1,308 cc, while the Porsche 928 relies on a V8 SOHC with 4,474 cc. In the sprint to 60 mph, the 1978 Porsche 928 4.5 edges ahead at 6.8 seconds versus 9.0 seconds. The Mazda Cosmo AP carries a weight advantage, tipping the scales 728 lbs lighter. Whether you prioritize driving dynamics, heritage, or aesthetic appeal, both contenders make a strong case for themselves.