UK vs Germany — 1975 vs 1978
| XJS V12 Coupe | 928 4.5 | |
|---|---|---|
| Horsepower | 285 hp | 240 hp |
| Torque | 320 lb-ft | 273 lb-ft |
| Engine Size | 5,343 cc | 4,474 cc |
| 0-60 mph | 7.6 sec | 6.8 sec |
| Top Speed | 150 mph | 143 mph |
| ¼ Mile | 15.7 sec | 15.1 sec |
| Weight | 3,954 lbs | 3,197 lbs |
| Wheelbase | 2,591 mm | 2,500 mm |
| Length | 4,869 mm | 4,445 mm |
| Units Produced | 115,413 | 15,800 |
| Original MSRP | $19,000 | $28,500 |
| Value (Excellent) | $55,000 | $55,000 |
| Collectibility | 6/10 | 8/10 |
| Rarity | 4/10 | 6/10 |
This matchup is remarkably close. The 1975 Jaguar XJS V12 Coupe offers more power, higher top speed, better value, while the 1978 Porsche 928 4.5 counters with quicker acceleration, lighter weight, greater rarity. Neither holds a decisive advantage, making this a true enthusiast's dilemma. Your choice ultimately depends on which driving philosophy resonates more with you.
When UK engineering meets Germany craftsmanship, the result is one of the most compelling matchups in the classic car world. The 1975 Jaguar XJS V12 Coupe and 1978 Porsche 928 4.5 embody their respective national automotive traditions while competing in the same arena. The 1975 Jaguar XJS V12 Coupe holds a clear advantage in raw power with 285 hp compared to 240 hp, a 45-horsepower difference that shapes the driving experience. Under the hood, the contrast is notable: the Jaguar XJS uses a V12 SOHC displacing 5,343 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 7.6 seconds. The Porsche 928 carries a weight advantage, tipping the scales 757 lbs lighter. Rarity plays a significant role here — with only 15,800 units built, the 1978 Porsche 928 4.5 is considerably scarcer than the Jaguar XJS's 115,413 examples. From a collectibility standpoint, the 1978 Porsche 928 4.5 rates higher among enthusiasts and auction houses.