UK vs Germany — 1957 vs 1955
| XKSS | 550 Spyder | |
|---|---|---|
| Horsepower | 262 hp | 110 hp |
| Torque | 240 lb-ft | 90 lb-ft |
| Engine Size | 3,442 cc | 1,498 cc |
| 0-60 mph | 5.2 sec | 8.5 sec |
| Top Speed | 149 mph | 137 mph |
| ¼ Mile | 13.2 sec | 16.0 sec |
| Weight | 2,249 lbs | 1,300 lbs |
| Wheelbase | 2,286 mm | 2,100 mm |
| Length | 3,912 mm | 3,700 mm |
| Units Produced | 16 | 90 |
| Original MSRP | $6,900 | $6,500 |
| Value (Excellent) | $18,000,000 | $7,000,000 |
| Collectibility | 10/10 | 10/10 |
| Rarity | 10/10 | 10/10 |
The 1957 Jaguar XKSS holds an edge across most measurable criteria, offering more power, quicker acceleration, higher top speed. That said, the 1955 Porsche 550 Spyder brings lighter weight, better value and remains a compelling choice for enthusiasts who value Porsche heritage. The right pick depends on whether you prioritize specifications or the intangible qualities that make a car truly special.
Putting the 1957 Jaguar XKSS against the 1955 Porsche 550 Spyder is a comparison that enthusiasts have debated for decades. Each car reflects distinct design philosophies shaped by different automotive cultures — UK versus Germany. The 1957 Jaguar XKSS holds a clear advantage in raw power with 262 hp compared to 110 hp, a 152-horsepower difference that shapes the driving experience. Under the hood, the contrast is notable: the Jaguar XKSS uses a Inline-6 DOHC (XK) displacing 3,442 cc, while the Porsche 550 Spyder relies on a Flat-4 DOHC 8V with 1,498 cc. In the sprint to 60 mph, the 1957 Jaguar XKSS edges ahead at 5.2 seconds versus 8.5 seconds. The Porsche 550 Spyder carries a weight advantage, tipping the scales 949 lbs lighter. Rarity plays a significant role here — with only 16 units built, the 1957 Jaguar XKSS is considerably scarcer than the Porsche 550 Spyder's 90 examples. On the collector market, the 1957 Jaguar XKSS commands a significant premium over the 1955 Porsche 550 Spyder, reflecting differences in prestige and rarity.