Germany vs Germany — 1975 vs 1983
| Kadett GT/E Coupe | Manta 400 | |
|---|---|---|
| Horsepower | 105 hp | 144 hp |
| Torque | 117 lb-ft | 150 lb-ft |
| Engine Size | 1,897 cc | 2,410 cc |
| 0-60 mph | 10.0 sec | 7.8 sec |
| Top Speed | 115 mph | 126 mph |
| ¼ Mile | 17.5 sec | 16.0 sec |
| Weight | 2,116 lbs | 2,381 lbs |
| Wheelbase | 2,518 mm | 2,575 mm |
| Length | 4,210 mm | 4,380 mm |
| Units Produced | 18,500 | 245 |
| Original MSRP | — | $22,000 |
| Value (Excellent) | $35,000 | $85,000 |
| Collectibility | 6/10 | 8/10 |
| Rarity | 7/10 | 9/10 |
The 1983 Opel Manta 400 emerges ahead in most objective measures, offering more power, quicker acceleration, higher top speed. The 1975 Opel Kadett GT/E Coupe 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.
The 1975 Opel Kadett GT/E Coupe and 1983 Opel Manta 400 share a manufacturer in Opel, but that's where the similarities get interesting. These two models reveal the versatility and ambition of the Opel brand. The 1983 Opel Manta 400 holds a clear advantage in raw power with 144 hp compared to 105 hp, a 39-horsepower difference that shapes the driving experience. Under the hood, the contrast is notable: the Opel Kadett uses a Inline-4 OHC displacing 1,897 cc, while the Opel Manta relies on a Inline-4 with 2,410 cc. In the sprint to 60 mph, the 1983 Opel Manta 400 edges ahead at 7.8 seconds versus 10.0 seconds. The Opel Kadett carries a weight advantage, tipping the scales 265 lbs lighter. Rarity plays a significant role here — with only 245 units built, the 1983 Opel Manta 400 is considerably scarcer than the Opel Kadett's 18,500 examples. On the collector market, the 1983 Opel Manta 400 commands a significant premium over the 1975 Opel Kadett GT/E Coupe, reflecting differences in prestige and rarity. From a collectibility standpoint, the 1983 Opel Manta 400 rates higher among enthusiasts and auction houses.