Germany vs West Germany — 1978 vs 1978
| 928 4.5 | Monza 3.0E GSE | |
|---|---|---|
| Horsepower | 240 hp | 180 hp |
| Torque | 273 lb-ft | 181 lb-ft |
| Engine Size | 4,474 cc | 2,969 cc |
| 0-60 mph | 6.8 sec | 8.0 sec |
| Top Speed | 143 mph | 137 mph |
| ¼ Mile | 15.1 sec | 16.0 sec |
| Weight | 3,197 lbs | 2,932 lbs |
| Wheelbase | 2,500 mm | 2,668 mm |
| Length | 4,445 mm | 4,692 mm |
| Units Produced | 15,800 | 43,728 |
| Original MSRP | $28,500 | — |
| Value (Excellent) | $55,000 | $30,000 |
| Collectibility | 8/10 | 5/10 |
| Rarity | 6/10 | 7/10 |
On balance, the 1978 Porsche 928 4.5 makes a stronger case on paper with more power, quicker acceleration, higher top speed. However, the 1978 Opel Monza 3.0E GSE counters with lighter weight, better value, and its appeal extends beyond mere numbers. Choose the 1978 Porsche 928 4.5 for outright capability, or the 1978 Opel Monza 3.0E GSE for a more distinctive ownership experience.
The rivalry between Germany and West Germany automotive industries has produced legendary matchups, and the 1978 Porsche 928 4.5 versus 1978 Opel Monza 3.0E GSE is among the most fascinating. These two cars represent the best of their national engineering schools. The 1978 Porsche 928 4.5 holds a clear advantage in raw power with 240 hp compared to 180 hp, a 60-horsepower difference that shapes the driving experience. Under the hood, the contrast is notable: the Porsche 928 uses a V8 SOHC displacing 4,474 cc, while the Opel Monza relies on a Inline-6 OHC with 2,969 cc. In the sprint to 60 mph, the 1978 Porsche 928 4.5 edges ahead at 6.8 seconds versus 8.0 seconds. The Opel Monza carries a weight advantage, tipping the scales 265 lbs lighter. On the collector market, the 1978 Porsche 928 4.5 commands a significant premium over the 1978 Opel Monza 3.0E GSE, reflecting differences in prestige and rarity. From a collectibility standpoint, the 1978 Porsche 928 4.5 rates higher among enthusiasts and auction houses.