It claims to come with a warranty.
http://www.carmonkeys.com/1994-JAGUAR-XJ12-Engine-Assembly-6-0L-VIN-3-7th-Digit-1-Year-Warranty?utm_campaign=google
http://www.carmonkeys.com/1994-JAGUAR-XJ12-Engine-Assembly-6-0L-VIN-3-7th-Digit-1-Year-Warranty?utm_campaign=google