West Germany vs Germany — 1981 vs 1968
| Manta 400 Rally Homologation | GT 1900 | |
|---|---|---|
| Horsepower | 144 hp | 90 hp |
| Torque | 155 lb-ft | 109 lb-ft |
| Engine Size | 2,420 cc | 1,897 cc |
| 0-60 mph | 8.5 sec | 9.2 sec |
| Top Speed | 129 mph | 115 mph |
| ¼ Mile | 16.0 sec | 17.0 sec |
| Weight | 2,337 lbs | 2,050 lbs |
| Wheelbase | 2,518 mm | 2,400 mm |
| Length | 4,470 mm | 4,145 mm |
| Units Produced | 245 | 103,373 |
| Original MSRP | — | $3,395 |
| Value (Excellent) | $200,000 | $35,000 |
| Collectibility | 8/10 | 7/10 |
| Rarity | 9/10 | 6/10 |
The 1981 Opel Manta 400 Rally Homologation holds an edge across most measurable criteria, offering more power, quicker acceleration, higher top speed. That said, the 1968 Opel GT 1900 brings lighter weight, better value and remains a compelling choice for enthusiasts who value Opel heritage. The right pick depends on whether you prioritize specifications or the intangible qualities that make a car truly special.
Within the Opel stable, the 1981 Opel Manta 400 Rally Homologation and 1968 Opel GT 1900 represent different approaches to performance and purpose. Both carry the Opel badge, yet each carves out its own distinct identity. The 1981 Opel Manta 400 Rally Homologation holds a clear advantage in raw power with 144 hp compared to 90 hp, a 54-horsepower difference that shapes the driving experience. Under the hood, the contrast is notable: the Opel Manta 400 uses a Inline-4 DOHC 16V displacing 2,420 cc, while the Opel GT relies on a Inline-4 with 1,897 cc. In the sprint to 60 mph, the 1981 Opel Manta 400 Rally Homologation edges ahead at 8.5 seconds versus 9.2 seconds. The Opel GT carries a weight advantage, tipping the scales 287 lbs lighter. Rarity plays a significant role here — with only 245 units built, the 1981 Opel Manta 400 Rally Homologation is considerably scarcer than the Opel GT's 103,373 examples. On the collector market, the 1981 Opel Manta 400 Rally Homologation commands a significant premium over the 1968 Opel GT 1900, reflecting differences in prestige and rarity.