UK vs UK — 1975 vs 1968
| XJS V12 Coupe | XJ6 Series I 4.2 | |
|---|---|---|
| Horsepower | 285 hp | 245 hp |
| Torque | 320 lb-ft | 283 lb-ft |
| Engine Size | 5,343 cc | 4,235 cc |
| 0-60 mph | 7.6 sec | 8.8 sec |
| Top Speed | 150 mph | 122 mph |
| ¼ Mile | 15.7 sec | 16.5 sec |
| Weight | 3,954 lbs | 3,722 lbs |
| Wheelbase | 2,591 mm | 2,762 mm |
| Length | 4,869 mm | 4,972 mm |
| Units Produced | 115,413 | 82,127 |
| Original MSRP | $19,000 | $6,560 |
| Value (Excellent) | $55,000 | $75,000 |
| Collectibility | 6/10 | 7/10 |
| Rarity | 4/10 | 5/10 |
On balance, the 1975 Jaguar XJS V12 Coupe makes a stronger case on paper with more power, quicker acceleration, higher top speed. However, the 1968 Jaguar XJ6 Series I 4.2 counters with lighter weight, stronger collectibility, and its appeal extends beyond mere numbers. Choose the 1975 Jaguar XJS V12 Coupe for outright capability, or the 1968 Jaguar XJ6 Series I 4.2 for a more distinctive ownership experience.
Jaguar has long offered a diverse lineup, and comparing the 1975 Jaguar XJS V12 Coupe with the 1968 Jaguar XJ6 Series I 4.2 highlights the breadth of the marque's engineering philosophy. The 1975 Jaguar XJS V12 Coupe holds a clear advantage in raw power with 285 hp compared to 245 hp, a 40-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 Jaguar XJ6 relies on a Inline-6 DOHC with 4,235 cc. In the sprint to 60 mph, the 1975 Jaguar XJS V12 Coupe edges ahead at 7.6 seconds versus 8.8 seconds. The Jaguar XJ6 carries a weight advantage, tipping the scales 232 lbs lighter. Each of these machines offers a unique window into the era that produced it, making both worthy of consideration by collectors and drivers alike.