Some cars leave a paper trail; the Jaguar XJ Spider Pininfarina left a name, a year — 1978 — and a place in Jaguar's list. What follows is what can be said with a source behind it.
In context
The cars a buyer would have weighed it against include the Mazda RX-7, the Toyota Supra, the GM (General Motors) Saab 900. Nearby in the Jaguar catalogue sit the F-Type and the Vanden Plas.
Owning one today
EPA combined economy is 21 mpg, about $4,450 a year in fuel at the EPA's assumptions. Condition, mileage and specification move any single car a long way from a headline figure.
The record
The open record for the Jaguar XJ Spider Pininfarina carries no verified engine, output, weight or price yet. MotorJury does not fill gaps with guesses; this entry gives the model a home in the catalogue and grows as sourced specifications and photographs arrive. Corrections: corrections@motorjury.com.
Jaguar XJ (X300) 
Jaguar XJ (X308) 
Jaguar XJ (X350) 
Jaguar XJ (X351) 
Jaguar XJ (X358) 
Jaguar XJ (XJ40)