UK vs UK — 1957 vs 1966
| XK150 S 3.8 | XJ13 Prototype | |
|---|---|---|
| Horsepower | 265 hp | 502 hp |
| Torque | 260 lb-ft | 360 lb-ft |
| Engine Size | 3,781 cc | 4,994 cc |
| 0-60 mph | 7.3 sec | 3.4 sec |
| Top Speed | 133 mph | 174 mph |
| ¼ Mile | 15.0 sec | 11.2 sec |
| Weight | 3,050 lbs | 2,000 lbs |
| Wheelbase | 2,591 mm | 2,438 mm |
| Length | 4,470 mm | 4,300 mm |
| Units Produced | 888 | 1 |
| Original MSRP | $5,300 | — |
| Value (Excellent) | $400,000 | — |
| Collectibility | 9/10 | 10/10 |
| Rarity | 8/10 | 10/10 |
Numbers favor the 1966 Jaguar XJ13 Prototype with more power, quicker acceleration, higher top speed. The 1957 Jaguar XK150 S 3.8 offers its unique character, and has its own devoted following. For those who let their heart decide, either car delivers a rewarding ownership experience.
Jaguar has long offered a diverse lineup, and comparing the 1957 Jaguar XK150 S 3.8 with the 1966 Jaguar XJ13 Prototype highlights the breadth of the marque's engineering philosophy. The 1966 Jaguar XJ13 Prototype holds a clear advantage in raw power with 502 hp compared to 265 hp, a 237-horsepower difference that shapes the driving experience. Under the hood, the contrast is notable: the Jaguar XK150 uses a Inline-6 DOHC displacing 3,781 cc, while the Jaguar XJ13 relies on a V12 DOHC with 4,994 cc. In the sprint to 60 mph, the 1966 Jaguar XJ13 Prototype edges ahead at 3.4 seconds versus 7.3 seconds. The Jaguar XJ13 carries a weight advantage, tipping the scales 1050 lbs lighter. Rarity plays a significant role here — with only 1 units built, the 1966 Jaguar XJ13 Prototype is considerably scarcer than the Jaguar XK150's 888 examples.