W hen it comes to risk versus reward, the V12 engine is surely the ultimate way to straddle the thin dividing line. On the one hand, a big 12-pot is massively at odds with today’s drive towards economy and environmental restraint, but on the other, it’s an automotive engineering extravagance to stir the soul. And in the Jaguar XJ-S and the Aston Martin DB7 Vantage, two different takes on the V12 can be experienced for a fraction of the price of a new eco-box. But should you indulge, and if so, which of these platform sharers is most worthy of a beleaguered fuel budget?
JAGUAR XJ-S
Jaguar’s V12 first appeared in production in 1971 under the nose of the Series 3 E-Type, but its origins are in the early ’60s,…