Jaguar XJ40 Tyres
- In 1986 the first Jaguar XJ40 and Sovereign took advantage of TRX Michelin technology and fitted 390mm wheels.
- These early millimetric wheels fitted 220/65R390 either Dunlop SP Supersport or Michelin TRX.
- Today for the Jaguar XJ40 cars fitting millimetric wheels we have the 220/65R390 Avon CR39.
- From 1990 some of the Jaguar XJ40 and Sovereign cars moved on to 225/65R15 Pirelli P5 tyres.
- Later the XJ40 moved on to 16” wheels some fitted 225/55R16 Dunlop Performa 2000 and some Pirelli P700-Z.
- The last of the Jaguar XJ40 4.0 Sport, Sovereign and Daimler Double 6 fitted 225/60R16 Pirelli.
Jaguar XJ40 Sovereign tyres
Today with the availability of tyres for these late 1980s and early 1990s tyres we would suggest that the 15” wheel option is your best bet, in that it offers the opportunity to fit the Pirelli P5 tyres that were developed by Pirelli and Jaguar themselves to compliment Jaguars XJ range of luxury cars.
Jaguar XJ40 Recommended Tyres
Jaguar XJ40 Original Equipment
The Pirelli P5 was an OE tyre fitted by Jaguar from new on the XJ40.
My 1992 built 1993 model year (according to the handbook) was available with:
Pirelli P5 225/65 R 15 99V.
Pirelli P4000 225/65 ZR 15 (IIRC the load rating was 99).
Dunlop SP Super Sport 100TD 220/65 R 390 97V (Michelins were also fitted in the same size - but presumably in earlier model years.)
On the 8Jx16 forged Sports lattice wheel:
Pirelli P600 225/55 ZR 16.
Dunlop Performa 2000 225/55 ZR 16.
The following year the XJ40 moved to 7Jx16 on cars with alloy wheels, replacing the 15" Teardrop and Roulete, and thee Metric Teardrop.
These used a Pirelli tyre in 225/60 16 size.
For a long time only the Pirelli P4000J (and later the Pirelli P4000E) were available in 225/65 15. Pirelli stopped making them - and I had to switch to 16" lattice alloys. It’s always the way, if the P5s had been available from you back then, I may not have changed wheels!
Jaguar XJ40 History
Throughout the 1970's Jaguar had been developing the classic Jaguar XJ40 which was an all-new model intended to replace the original XJ6. Due to problems at British Leyland and the fuel crisis, the car was continually delayed. Proposals from Jaguar's in-house designers and Pininfarina were received. Eventually it was decided an internal design would be carried through to production. This car was finally released in October 1986 with controversial square headlamps on all but the lowest specification, these were a lingering feature from the 1970s development. The car was considered more evolutionary than revolutionary, receiving improvements such as the second generation of Jaguar's IRS. It had to fight off a new competitor, the recently enlarged classic E32 7 series BMW.
While the British press favoured the Jaguar, the XJ40 tended to lose comparison tests run by German publications. Only six-cylinder models were initially offered: a 2.9 L and a 3.6 L. The V12 and a long wheelbase model, including a high-roofed Daimler Majestic model and destined for official use, were again delayed, being launched at the very end of the XJ40's life.
The delay in fitting the V12 engine was due to the design of the engine bay which was too narrow to allow a V formation engine, said to have been designed deliberately in that fashion as the designers feared that their parent company would insist use of an engine based on their widely-used Rover V-8. After Jaguar's takeover by Ford in December 1989, work began on redesigning the engine bay to accommodate the V12. Ironically, thanks to Ford, Jaguar was later to find itself back in common ownership with another part of the old Rover family, Land Rover, where they had previously been thanks to British Leyland. However, having since developed their own more modern V8, they saw the reverse happen with a version of their engine fitted to the now classic Land Rover models, from which the old Rover V8 was finally dropped.
XJ6 4.0 Sovereign Tyres
A: The first of these Jaguars fitted 220/65R390 Michelin TRX or Dunlop Supersport. The only option currently is the Avon TurboSpeed. Then in the early 1990s the XJ40 sport and Sovereign models fitted 225/65R15 Pirelli Cinturato P5. Then they later fitted 15” wheels with 225/55R16 Pirelli P700-Z then from 1994 the fitted 225/60R16 Pirelli.