Since 1950 Jaguar had been building large, separate chassis saloon cars, starting with the Mk VII. In 1958 the final derivative arrived, the Jaguar Mk IX. The Mk IX utilised the famous XK engine which had evolved into a powerful (220bhp) 3.8 litre unit, enough to haul this large saloon car up to a top speed of 117mph.
The Mk IX had a body identical to that used on the previous Mk VIII, although it did have an improved heater and a new badge to distinguish it!. This handsome saloon came with power steering, all-round disc brakes and a choice of manual or automatic transmission. At the time the Mk IX was considered on par with the then current Bentley S-type, even though it was a third of the price...
The Mk IX was finally superseded by the Mk X in 1961, marking the end of a distinguished line of separate chassis Jaguar saloons.
Further information submitted:
There is no doubt that the Jaguar Mk IX Saloon would out-perform the equivalent 3.8 Mk X, its successor (1961-64).
The Autocar Used Car Road Test No 200, dated 14 November 1962, on an automatic transmission Mk IX gave performance figures of 0-60mph in 10.1 secs, 30-70mph through the autobox in 9.1secs and a standing quarter mile in 17.6secs. This vehicle had a recorded mileage of 34,000-odd at the time.
The manual/overdrive model was no doubt a genuine 120mph car in overdrive top!