Verdict
C
Jaguar S-Type — spec data and generation history.

Ford-era Jaguar mid-size saloon — built at Castle Bromwich on the Ford DEW98 platform shared with the Lincoln LS. Retro styling cribbed from the original 1960s S-Type. UK got 2.5 / 3.0 V6 petrol, 2.7 V6 diesel, 4.2 V8 (and supercharged S-Type R 400 bhp). 2004 facelift smoothed the bonnet line and improved the cabin. Discontinued 2008, replaced by the XF — which fixed every problem the S-Type had. Cheap to buy now; not particularly cheap to run. The R is the cult halo.
Click any generation for the full deep dive

S-Type R (4.2 SC V8) — 400 bhp, 0-62 in 5.6s.
Common faults reported on each generation — useful when shopping the used market.
BMW 5 Series · Mercedes E-Class · Audi A6 · Lexus GS